All questions
Question 1
A school district is choosing where to drill a new water well. A diagram shows three nearby sites:
- Site 1: thick clay at the surface and below (labeled “water does not pass through easily”)
- Site 2: a layer of sand and gravel in a valley (labeled “deposited by an ancient river over thousands of years”) above bedrock
- Site 3: solid granite at the surface (labeled “few spaces for water”)
Based on the diagram, where would groundwater be most likely found in usable amounts, and why?
- Site 1, because clay always holds the most groundwater and releases it easily to wells
- Site 2, because deposited sand and gravel can store and transmit groundwater and formed over long time in that valley (correct answer)
- Site 3, because granite creates groundwater as soon as it is exposed at the surface
- All three sites equally, because water resources are not controlled by the type of geologic material
Explanation: Using geology to explain resource distribution identifies ideal sites for groundwater based on material types and formation history. Geologic processes form resources by depositing permeable layers that store and transmit water. Different processes, such as ancient river deposition, create aquifers in sand and gravel valleys. To check understanding, identify the process like long-term sediment buildup in a diagram and link it to usable water. A common misconception is that all rocks hold water equally or resources are human-made, but permeability matters. Earth resources reflect long-term geologic history, from glacial or fluvial actions. This underscores how site-specific geology guides resource extraction decisions.
Question 2
Use the diagram of a volcanic arc and nearby ore deposits. The diagram labels: (1) magma rising beneath a volcano, (2) hot fluids moving through cracks in rock, (3) a zone labeled “copper-gold minerals” forming along those cracks, and (4) an arrow labeled “millions of years” showing repeated eruptions and cooling. Based on the diagram, which geologic process most directly formed the copper-gold mineral deposit?
- Rapid erosion that instantly concentrates copper and gold in one season
- Volcanism that drives hot fluids to deposit minerals in cracks over long time periods (correct answer)
- People manufacturing copper and gold underground where they need it
- Random mineral formation that happens equally in all rock types and locations
Explanation: Using geology to explain resource distribution helps us understand why certain materials like metals are found in specific places on Earth. Geologic processes form resources by concentrating elements through natural mechanisms over vast periods. Different processes, such as volcanism, create metal deposits by circulating hot fluids that deposit minerals in rock cracks. To check understanding, identify the process like volcanic activity in a diagram and link it to how it forms resources like copper-gold ores. A common misconception is that resources form randomly or are created by human actions, but they result from specific geologic conditions. Earth resources reflect long-term geologic history, showing patterns tied to plate tectonics and volcanic arcs. Overall, studying these processes reveals why some regions are rich in certain minerals while others are not.
Question 3
A data set shows how a sedimentary basin changed over time:
- 50 million years ago: swampy coastal plain with lots of plant material
- 40 million years ago: thick sediment layers bury the plant material
- 10 million years ago: more burial and pressure; a rock layer labeled “coal” appears
- Today: coal is found only in the parts of the basin where the swamp deposits were buried deepest
Which statement is supported by the data?
- Coal is linked to past environments with plant material and to long‑term burial, so it occurs only in certain parts of the basin (correct answer)
- Coal forms every year in modern swamps, so it should be found everywhere near today’s coast
- Coal forms randomly, so depth and the basin’s history do not matter
- Coal exists only where humans decide to dig, because technology determines where it occurs
Explanation: Using geology to explain resource distribution traces coal formation in basins with ancient swamps and burial. Geologic processes form resources by compressing plant material under increasing pressure over time. Different processes, such as sedimentation in coastal plains, create coal in deeply buried zones. To check understanding, identify the process like long-term burial in a data set and link it to coal locations. A common misconception is that resources form randomly or through modern human actions, but they depend on past environments. Earth resources reflect long-term geologic history, showing patterns from ancient ecosystems. This highlights how basin evolution controls resource availability today.
Question 4
A map shows three regions with different geology:
- Region A: labeled “young volcanic rocks”
- Region B: labeled “thick sedimentary basin (layers buried for millions of years)”
- Region C: labeled “ancient hard crystalline rocks exposed at the surface”
The map also marks known oil fields only in Region B. Which explanation best uses the map evidence to link geology and resource location?
- Oil fields appear in Region B because long‑term burial in sedimentary layers supports forming and trapping fossil fuels (correct answer)
- Oil fields are in Region B because that region is closest to roads and drilling equipment
- Oil fields are in Region B by chance, and the same amount should exist in Regions A and C
- Oil fields must be in Region A because volcanoes create oil quickly during eruptions
Explanation: Using geology to explain resource distribution maps why oil is found in sedimentary basins rather than volcanic or crystalline rocks. Geologic processes form resources by burying and trapping hydrocarbons in layered sediments. Different processes, such as long-term sedimentation, create oil fields by transforming buried organic matter. To check understanding, identify the process like basin burial on a map and link it to fossil fuel locations. A common misconception is that resources appear by chance or due to human infrastructure, but they require specific geologic histories. Earth resources reflect long-term geologic history, with oil linked to ancient basins. Broadly, this shows how regional geology predicts resource potential.
Question 5
A diagram shows a coastline where sediment is deposited in layers (sedimentation). Over time, more layers bury the older ones (burial). The diagram labels a “limestone layer (building stone resource)” and notes: “This layer formed from sediments in a shallow sea over millions of years. Limestone is found where these ancient seafloor deposits were preserved.”
Which claim is incorrect based on the diagram?
- Limestone can form from sediments deposited in shallow seas and later buried over long time periods
- Limestone is more likely where ancient seafloor layers exist, so geology controls its distribution
- Limestone can be expected in any place on land because sedimentary layers form the same everywhere (correct answer)
- Burial helps preserve and turn sediments into rock layers that can become resources
Explanation: Using geology to explain resource distribution investigates sedimentary environments and preservation to locate rock resources. Geologic processes form resources by depositing and burying materials in seas, compacting them into stone. Different processes create different resources; marine sedimentation forms limestone, contrasting with igneous processes for other minerals. A checking strategy is to identify the process, such as seafloor layering and burial, and connect it to the resource like durable stone. A misconception is that resources are uniformly spread without geologic variation, but they depend on ancient settings. Earth resources reflect long-term geologic history, with shallow seas preserving layers over millions of years. Generally, this shows how past oceans determine building material locations.
Question 6
A cross-section shows a river valley with older rock layers tilted and then cut by erosion. On top of the eroded surface, a new flat layer of sand and gravel is deposited (sedimentation). The sand and gravel layer is labeled “placer gold deposit,” and a note says: “Gold particles are concentrated by moving water over long periods; deposits occur where river flow slows.”
Which explanation best links the geologic processes to where the gold resource is found?
- Gold forms inside the sand grains as soon as the sand is deposited
- Gold is concentrated by erosion and sedimentation in rivers, so it is found in certain river deposits where water slows (correct answer)
- Gold appears mainly where people search carefully, so geology does not control its location
- Gold deposits are evenly spread across all rock layers because Earth’s crust is mixed the same everywhere
Explanation: Using geology to explain resource distribution tracks how erosion and water movement concentrate heavy materials. Geologic processes form resources by weathering rocks and depositing particles in streams over time. Different processes create different resources; river sedimentation sorts gold placers, distinct from volcanic deposition of veins. A checking strategy is to identify the process, such as erosion and slow-water deposition, and relate it to the resource like concentrated gold. A common misconception is that resources are evenly distributed or human-placed, but they result from natural sorting. Earth resources reflect long-term geologic history, with rivers reshaping landscapes over extended periods. In general, this illustrates how dynamic Earth surfaces control mineral placements.
Question 7
A data card describes two sedimentary basins:
- Basin M: 6 km of layered sediments; includes an “organic-rich shale” layer; evidence of long burial (high compaction).
- Basin N: 0.5 km of sediments; mostly sand; little compaction.
Oil and natural gas form from buried organic material over tens of millions of years, and geology controls where thick, buried organic layers exist.
Which basin is more likely to contain oil and natural gas resources?
- Basin N, because thinner sediment means resources form faster
- Basin M, because thick burial and organic-rich layers provide the conditions for oil and gas over long time (correct answer)
- Both basins equally, because fossil fuels renew quickly each year
- Neither basin, because oil and gas are created by machines during drilling
Explanation: Using geology to explain resource distribution assesses basin thickness and composition for transformation conditions. Geologic processes form resources by deeply burying organic layers, allowing pressure to generate hydrocarbons. Different processes create different resources; thick sedimentation produces oil, unlike thin layers that lack sufficient burial. To verify, identify the process like compaction in deep basins, and link it to the resource such as trapped gas. One misconception is that resources renew quickly or are machine-made, but they require geologic timescales. Earth resources reflect long-term geologic history, with basin accumulation over tens of millions of years. This generalization emphasizes how sediment depth influences energy resource formation.
Question 8
Two simplified cross-sections show different geologic settings.
Section A: A volcano with magma below; cracks around it; label “metal-rich mineral veins.” Note: “Minerals concentrate as hot fluids cool over millions of years.”
Section B: A broad basin with many flat sediment layers; label “oil and gas trapped in porous rock under a sealing layer.” Note: “Organic material buried and changed over tens of millions of years.”
Which comparison is supported by the two sections?
- Both resources form by the same process, so they should be found in the same places
- Metal veins are linked to volcanism and fractures, while oil and gas are linked to long‑term sedimentation and burial in basins (correct answer)
- Oil and gas form mainly from lava cooling, while metal veins form mainly from buried plants
- Resource locations are controlled mostly by modern technology, not by geology
Explanation: Using geology to explain resource distribution compares settings to see how processes lead to varied material concentrations. Geologic processes form resources by either volcanic activity depositing metals or sedimentary burial creating hydrocarbons. Different processes create different resources; fractures and hot fluids form metal veins, while basin sedimentation produces oil and gas. To check, identify the process in each setting, like magma pathways versus layered burial, and link to the specific resource. A misconception is that all resources form similarly and are human-created, but they depend on distinct natural mechanisms. Earth resources reflect long-term geologic history, with volcanoes and basins operating over millions of years. This generalization underscores that resource types are tied to unique geologic environments.
Question 9
A simplified cross-section shows (from top to bottom): soil, sandstone, shale, and limestone. A well is drawn reaching into the sandstone. Blue shading fills the sandstone layer but stops at the shale. Labels say: “Sandstone = porous,” “Shale = blocks water,” and “water stored underground builds up as sediments become rock over thousands to millions of years.” Which statement about resource formation is supported by the cross-section, showing geology controls where the groundwater resource occurs?
- Groundwater is stored mainly in porous layers like sandstone and is limited by less porous layers like shale, so it occurs in specific geologic layers. (correct answer)
- Groundwater forms randomly, so it should be equally available in all rock types and at any depth.
- Groundwater is created by the well itself, so it did not exist before drilling started.
- Groundwater can only exist on the surface because underground rocks are always completely solid with no spaces.
Explanation: Using geology to explain resource distribution involves examining how rock properties and layers control storage of materials like groundwater. Geologic processes form resources through the creation of porous structures that hold and limit water movement over time. Different processes create different resources; sediment compaction forms aquifers, contrasting with volcanic deposition for minerals. To confirm a statement, identify the process, such as water storage in porous rocks bounded by impermeable layers, and link it to the resource's geologic control. A misconception is that resources are random or created by drilling, but they exist due to natural underground formations. Earth's resources reflect long-term geologic history, with processes over thousands to millions of years building these systems. Recognizing this helps understand resource availability in specific layers.
Question 10
A map-style diagram shows three regions with different rock types and processes:
- Region X: Young volcanic mountains with many past lava flows.
- Region Y: Flat plain with thick layers of sandstone and shale labeled “sedimentary basin (very old layers).”
- Region Z: Exposed hard metamorphic rock with strong erosion and little sediment cover.
A company wants to search for oil. Based on the diagram, where should they focus and why?
- Region X, because volcanoes always create oil wherever lava cools.
- Region Y, because thick sedimentary layers and long-term burial make oil and gas more likely in sedimentary basins. (correct answer)
- Region Z, because erosion exposes rocks, so oil must be sitting on the surface.
- Any region, because oil forms randomly and does not depend on rock type or geologic history.
Explanation: This question tests using geology to explain where oil resources are most likely to be found based on rock types and geologic history. Geologic processes determine resource distribution - oil and gas form in sedimentary basins where organic material was buried and transformed over millions of years. Region Y's thick sedimentary layers in an old basin provide the right conditions for oil formation, unlike volcanic or metamorphic terrains. To check your answer, identify the rock type and geologic history that matches oil formation requirements (sedimentary basin with burial). A common misconception is that oil forms randomly or in any rock type, but it requires specific sedimentary conditions. Earth's petroleum resources are concentrated in sedimentary basins that preserve evidence of ancient seas and burial. This predictable relationship between geology and resources guides exploration efforts worldwide.
Question 11
A cross-section diagram shows an ocean margin where layers of sand and mud build up (sedimentation) on the seafloor. Deeper layers are labeled “older,” and a dark, lens-shaped layer labeled “oil and natural gas” is trapped beneath a curved “cap rock.” The diagram also shows “burial + heat over millions of years” acting on buried organic-rich mud. Based on the diagram, which statement is supported by the evidence about why oil and natural gas occur in this location?
- Oil and natural gas formed because thick sediments buried organic material and, over a very long time, heat and pressure changed it and trapped it under cap rock. (correct answer)
- Oil and natural gas appear in any rock layer as long as people drill deep enough, so geology does not control where they occur.
- Oil and natural gas formed quickly when seawater evaporated at the surface, so they should be found mostly in the youngest layers.
- Oil and natural gas formed randomly underground, so their locations cannot be linked to sedimentation or burial.
Explanation: This question tests the skill of using geology to explain why oil and natural gas resources occur in specific locations. Geologic processes like sedimentation, burial, heat, and pressure over millions of years create these fossil fuel resources. Different processes create different resources - oil and gas form when organic-rich sediments are buried deeply and transformed by heat and pressure, then trapped beneath impermeable cap rock. To check your answer, identify the process shown (burial and transformation of organic material) and link it to the resource (oil and gas trapped under cap rock). A common misconception is that oil and gas appear randomly or can be found anywhere if we drill deep enough, but they actually require specific conditions. Earth's resources reflect long-term geologic history - oil and gas deposits tell us about ancient seas where organic material accumulated and was later buried. Understanding these processes helps us predict where to find these valuable energy resources.
Question 12
A cross-section diagram shows a river carrying sand and mud into the ocean, building layered sediment on the seafloor. The lowest layers are labeled “older,” and a bracket shows “burial and compaction over tens of millions of years.” A dark layer is labeled “oil and natural gas trapped beneath cap rock.” According to the diagram, which process formed the oil and natural gas resource shown?
- Rapid cooling of lava at Earth’s surface during a single eruption
- Sedimentation followed by deep burial over long time, forming and trapping hydrocarbons in layered rocks (correct answer)
- Random appearance of fuel in any rock layer regardless of how the layers formed
- Human manufacturing of oil underground after drilling begins
Explanation: Using geology to explain resource distribution means recognizing how Earth's processes lead to the concentration of materials like oil and natural gas in certain areas. Geologic processes form resources through the accumulation, burial, and transformation of organic matter over vast timescales. Different processes create different resources; sedimentation and deep burial produce hydrocarbons, whereas volcanic activity might form metallic ores. To evaluate a process, identify the one depicted, such as layered sedimentation followed by long-term burial and trapping, and connect it to the resource like trapped oil. A misconception is that resources form randomly or are manufactured by humans, but they depend on specific natural geologic sequences. Earth's resources reflect long-term geologic history, with processes like sediment accumulation over millions of years determining their locations. This understanding shows why resources are unevenly distributed across the planet.
Question 13
Two simplified cross-sections show different geologic settings:
- Setting 1: A river delta depositing mud and sand; deeper layers labeled “burial over millions of years”; a layer labeled “coal seam.”
- Setting 2: A volcanic mountain with magma below; cracks labeled “hot fluids”; a zone labeled “metal minerals.”
Which comparison is supported by the cross-sections?
- Coal is linked to sedimentation and long‑term burial, while some metal minerals are linked to volcanism and hot fluids (correct answer)
- Coal and metal minerals both form only by surface erosion acting for a few days
- Coal forms anywhere people build mines, and metal minerals form only where rivers deposit sand
- Any process can form any resource, so the settings do not matter
Explanation: Using geology to explain resource distribution compares how coal and metals form in distinct settings. Geologic processes form resources through burial for coal and hot fluid circulation for metals. Different processes, including sedimentation versus volcanism, create varied resources like coal seams or mineral veins. To check understanding, identify processes in cross-sections and link them to specific resource types. A common misconception is that all resources form the same way or randomly, but they tie to unique geologic environments. Earth resources reflect long-term geologic history, showing diversity from deltas to volcanic zones. This generalization underscores that resource patterns stem from Earth's dynamic processes over millions of years.
Question 14
A table summarizes evidence from two rock layers in a basin:
- Layer X: dark shale, many tiny plant fragments, formed in quiet water; labeled “buried by more sediment for millions of years.”
- Layer Y: loose sand and gravel at the surface, formed by a fast river last year.
Geologists report oil is found in Layer X but not in Layer Y. Which statement is supported by the evidence in the table?
- Oil is most likely where organic material was buried by sediment over long time periods (correct answer)
- Oil forms quickly in any sand and gravel as long as a river is nearby
- Oil appears randomly and is equally likely in all layers regardless of how they formed
- Oil is created by drilling technology, so it can be made in Layer Y if the tools are strong enough
Explanation: Using geology to explain resource distribution reveals why fossil fuels like oil are concentrated in particular sedimentary layers. Geologic processes form resources by transforming organic material under heat and pressure from burial. Different processes, such as sedimentation in quiet waters, create oil by burying plant fragments over millions of years. To check understanding, identify the process like long-term burial in a table and link it to resource formation in specific layers. A common misconception is that resources like oil form quickly or randomly in any sediment, but they require specific burial conditions. Earth resources reflect long-term geologic history, with oil tied to ancient depositional environments. In summary, geology shows that resource locations depend on past sedimentation and time scales.
Question 15
A student says: “Coal is found in our state because coal forms anywhere there are trees today.”
A diagram of a coal layer shows: (1) an ancient swamp with plant material accumulating, (2) layers of sediment covering it (burial), and (3) a labeled coal seam in sedimentary rock. The diagram note says: “This change takes millions of years, so coal occurs only where ancient swamps were buried and preserved.”
Which part of the student’s claim is incorrect based on the diagram?
- Coal is linked to burial of plant material in sedimentary layers over long time periods
- Coal forms wherever trees exist today, regardless of burial and geologic history (correct answer)
- Coal formation involves sedimentation and burial that can preserve plant material
- Coal seams are found in specific rock layers, not evenly spread through all rocks
Explanation: Using geology to explain resource distribution examines ancient environments and burial to trace material transformations. Geologic processes form resources by covering organic accumulations with sediments, preserving them as they change. Different processes create different resources; swamp burial leads to coal, unlike erosion concentrating metals. For accuracy, identify the process like sediment layering over plants, and link it to the resource such as coal seams. A misconception is that resources like coal form in modern settings without geologic history, but they need millions of years of preservation. Earth resources reflect long-term geologic history, with ancient swamps dictating where coal is preserved. This generalizes that resource distribution is rooted in past ecosystems and burial events.
Question 16
A diagram shows a groundwater aquifer. Labels include: “rain soaks into ground,” “porous sandstone layer,” “impermeable clay layer,” and “well draws water from sandstone.” A note says, “Sandstone layer formed from sand deposited, then buried and cemented over a very long time.” Based on the diagram, where would groundwater be most likely stored and why?
- In the porous sandstone, because spaces between grains can hold water and the layer formed over long time (correct answer)
- In the impermeable clay, because water always moves fastest through the tightest materials
- Only in surface puddles, because resources cannot be stored underground
- Equally everywhere underground, because geology does not control where water can collect
Explanation: Using geology to explain resource distribution shows why groundwater accumulates in certain rock types underground. Geologic processes form resources by allowing water to infiltrate and store in porous materials over time. Different processes, like deposition and cementation, create aquifers in sandstone by forming spaces between grains. To check understanding, identify the process such as rainwater soaking into porous layers in a diagram and link it to water storage. A common misconception is that resources like water are equally available everywhere or only on the surface, but they depend on rock permeability. Earth resources reflect long-term geologic history, with aquifers building from ancient sedimentation. Ultimately, this highlights how geology controls access to vital resources like fresh water.
Question 17
Two simplified diagrams show different geologic settings.
- Diagram 1: A volcano with a labeled “mineral deposit zone” near cooling magma.
- Diagram 2: A coastal basin with thick sediment layers and a labeled “oil and gas trap” under cap rock, with “burial over millions of years.”
Which comparison is supported by the diagrams?
- Both resources form instantly at the surface, so the diagrams show that time is not important.
- Metal ore minerals are linked to volcanism, while oil and gas are linked to sedimentation and long-term burial in sedimentary basins. (correct answer)
- Oil and gas are most likely to form inside volcanic lava flows, because all resources come from the same process.
- Resource locations are determined mainly by where people decide to search, not by geologic processes.
Explanation: This question requires using geology to explain why different resources form in different geologic settings. Geologic processes create specific conditions that determine which resources can form - volcanic processes concentrate metals while sedimentary processes create oil and gas. Metal ores form near cooling magma in volcanic settings, while oil and gas require burial of organic-rich sediments in sedimentary basins over millions of years. To check your answer, identify each geologic setting and match it to its characteristic resource type. A common misconception is that all resources form through the same process or that location doesn't matter. Earth's diverse resources reflect the variety of geologic processes operating over time. Understanding these process-resource relationships helps geologists predict where to search for specific materials.
Question 18
A diagram shows an uplifted mountain range with a note: “Uplift exposes deep rocks; erosion removes overlying layers.” The diagram also labels a “copper vein” that originally formed deep underground along cracks and is now exposed on the hillside. Which statement about how geology affects where this copper resource is found is supported by the diagram?
- Erosion and uplift can expose mineral deposits that formed deep underground over long time, concentrating mining sites in certain areas (correct answer)
- Copper veins can only form on the surface, so uplift and erosion are not related to their location
- Copper appears instantly whenever a mountain is created, regardless of rock type or time
- Copper is equally likely in flat plains and mountains because resource locations do not depend on geology
Explanation: Using geology to explain resource distribution shows how uplift and erosion reveal deep mineral veins in mountains. Geologic processes form resources by depositing minerals in cracks, later exposed by surface changes. Different processes, including tectonic uplift, create accessible deposits from ancient formations. To check understanding, identify the process like erosion exposing veins in a diagram and link it to mining sites. A common misconception is that resources form randomly or only on surfaces, but they originate deep and require exposure. Earth resources reflect long-term geologic history, influenced by mountain-building events. In general, this demonstrates geology's role in resource accessibility.
Question 19
A cross-section shows a coastal area where layers build outward into the ocean. Labels include: “sedimentation at shoreline,” “older layers deeper,” “burial increases with depth,” and “natural gas trapped under a tight rock layer.” The time scale bar shows the deepest layers are “tens of millions of years old.” Where would natural gas most likely occur according to the cross-section?
- In deeper, older sedimentary layers where burial and trapping under a tight layer can occur over long time (correct answer)
- Only in the newest surface sand because gas forms fastest where rocks are youngest
- In any rock at any depth because the location of gas is not controlled by geology
- In the air above the coast because natural gas cannot be stored underground
Explanation: Using geology to explain resource distribution predicts where natural gas traps in coastal sedimentary layers. Geologic processes form resources by burying organic material and sealing it under impermeable rocks. Different processes, including deepening sedimentation, create gas pockets in older, deeper strata. To check understanding, identify the process like burial over millions of years in a cross-section and link it to trapped gas. A common misconception is that resources like gas form randomly or only at the surface, but they need specific depth and time. Earth resources reflect long-term geologic history, tied to shoreline progradation. Overall, geology explains why such resources are unevenly distributed.
Question 20
A coastal basin diagram shows layers building up: sand and mud are deposited on the seafloor, then more layers cover them (burial). Deeper layers are labeled “organic-rich mud layer,” and a note says: “Over tens of millions of years, burial and pressure turn buried organic material into oil and natural gas. These resources occur only where thick sediment piles formed.”
Which statement is supported by the diagram and note?
- Oil and natural gas form quickly after a storm deposits sand on a beach
- Oil and natural gas are equally likely in any location because they do not depend on geology
- Oil and natural gas can form where organic-rich sediments are buried under many layers for a long time (correct answer)
- Oil and natural gas are made by drilling machines deep underground
Explanation: Using geology to explain resource distribution means examining how burial and pressure transform materials over time in certain areas. Geologic processes form resources by burying organic matter deep underground, where heat and pressure convert it into usable forms. Different processes create different resources; sedimentation and long-term burial produce oil and natural gas, unlike volcanic processes that form metals. A checking strategy is to identify the process shown, like layered sediment accumulation, and connect it to the resource, such as trapped hydrocarbons. One misconception is that resources like oil form quickly or are human-made through drilling, but they require natural geologic transformations. Earth resources reflect long-term geologic history, with basins accumulating thick sediments over millions of years. Overall, this shows how past depositional environments determine where energy resources are found today.