Fundamentals of Geology Practice Exam

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• What defines a sedimentary basin?
• What is the main factor influencing the speed of weathering in rocks?
• Which layer of the Earth is composed primarily of silicate minerals?
• What does the term "slump" refer to in geology?
• Which ratios are useful in determining the age of rocks or sediments?
• Which statement is NOT true about a sedimentary facies?
• How does the process of compaction affect porosity?
• Which pair of features is likely composed of sediments with different grain size and sorting characteristics?
• Which mineral is commonly used in the phyllosilicate group?
• What impact does cementation have on the porosity of sedimentary rocks?
• What major factor influences the physical properties of rocks?
• In which scenario would stereo-paired aerial photographs be least useful?
• What are the main components of granite?
• What type of seismic waves travel fastest through the Earth?
• What is a single mineral deposit that contains commercially viable amounts of a particular mineral called?
• What is the inverse order of evaporite deposition?
• What geophysical method is most effective for mapping deeply buried bedrock pediments at a depth of 1500 feet?
• What type of metamorphism occurs due to contact with molten rock?
• Which type of rock is most commonly associated with volcanic activity?
• How does diagenesis generally affect the overall quality of an oil or gas reservoir?
• What is the difference in amplitude between a magnitude 6 and a magnitude 8 earthquake, as defined by Richter on a Wood-Anderson seismograph?
• What geological process describes the movement of tectonic plates?
• Given 0.65 cubic feet of a soil sample weighing 36.2 pounds with a moisture content of 15%, what is the dry density of the soil?
• What is ground-penetrating radar primarily useful for determining?
• What feature is commonly formed at the divergent boundaries of tectonic plates?
• What are oscillatory waves in inland bodies of water referred to as?
• The storage coefficient and transmissivity are parameters calculated using what equation?
• What is the name of the scale used to assess the effects or damage caused by an earthquake at a specific location?
• Which geological process involves the wearing away of solid rock?
• What is the term for a volcanic eruption characterized by explosive outbursts?
• What are the Liquid Limit (LL) and Plasticity Index (PI) values associated with a soil classified as CH?
• What geophysical technique is most suitable for investigating a skarn?
• Sphalerite, willemite, and smithsonite are classified as what type of ores?
• Which of the following is most likely to have the lowest porosity?
• What does a drawdown in a well indicate about water levels in an aquifer?
• What is meant by metamorphic foliation?
• What are circular depressions found in limestone regions typically referred to?
• Which layer of the Earth is composed primarily of liquid iron and nickel?
• What type of stress causes rocks to deform and change shape?
• Which term best describes a well that has been designed to fully penetrate a confined aquifer?
• What is the purpose of employing biostratigraphic zones?
• What factor is most directly related to the rate of production from a subsurface reservoir?
• What is the role of weathering in the rock cycle?
• What type of water has never circulated in the hydrologic cycle?
• How does subduction contribute to mountain formation?
• What is the name for the process by which rocks are broken down into smaller pieces?
• What is a key characteristic of highly porous sedimentary rocks regarding fluid flow?
• What does the term "argillaceous" imply about a rock?
• What type of rock is formed from the accumulation of biological debris?
• Which soil type classified by the Unified Soil Classification System is the best aquitard?
• What happens to the porosity of sedimentary rocks as they become more lithified?
• What can a geologist infer from a sedimentary rock with very low porosity?
• How do tectonic forces affect sedimentary layers?
• What role does vegetation play in soil erosion?
• When is a groundwater model considered calibrated?
• What process leads to the formation of sinkholes?
• What does the term “igneous intrusion” refer to?
• What type of sedimentary rock is likely to have a high capacity for oil storage due to its porosity?
• Which scale is commonly used to measure the magnitude of earthquakes?
• What type of igneous rock is likely to contain large crystals?
• Which mineral group contains the greatest number of different minerals, including quartz and feldspar?
• What mineral is commonly used to define the hardness scale in geology?
• Large smooth elongated windblown deposits that extend parallel to the prevailing wind are known as what?
• What does the porosity of sedimentary rock primarily indicate?
• Which geological feature forms at a divergent plate boundary?
• What is a hot spot in geological terms?
• What is the main difference between a breach and a failure in rock mechanics?
• The creation of new oceanic crust is balanced by what geological process?
• What type of glaciers form in mountainous regions?
• Which mineral is a major source of lead?
• Which type of rock is typically formed by the accumulation of sediment over time?
• What is a primary factor influencing the capacity of a river to transport sediment?
• What is a monocline in geological terms?
• Groundwater that flows through different pores at different rates and flow paths that vary in length is caused by what process?
• Which type of sedimentary rock is characterized by the presence of particles derived from other rocks?
• What is the term for a cross-stratified sand lens containing thin streaks of mud?
• Settlement calculations in geology rely on data obtained from which laboratory test?
• What term describes the point on the Earth's surface directly above an earthquake's origin?
• What is the primary component of the Earth's core?
• Define the concept of isostasy in geology.
• Which of the following is NOT typical of glacial deposits?
• What is the primary driving force behind plate tectonics?
• What geological feature is formed by the erosion of softer rocks leaving harder rocks behind?
• Which instrument type is NOT suitable for measuring differential movement across a landslide slip surface?
• How do fossils contribute to our understanding of geological time?
• Which type of fault is characterized by horizontal motion along the fault plane?
• Which type of geological deposit is most closely associated with rare earths?
• What characteristic of hydraulic conductivity would be expected in an eolian sand aquifer?
• Which type of sediment sampling is crucial for preserving material integrity?
• Which anion is considered the least reactive and most persistent tracer of a geochemical contaminant plume?
• If a stream crosses a strike-slip fault without changing its course, what can be concluded?
• Caves found within limestone are primarily formed by which process?
• What is the principle of uniformitarianism?
• Where will water be traveling the fastest in a meandering stream?
• The storage coefficient in an unconfined aquifer is equal to which of the following?
• What does an esker primarily consist of?
• What action should be taken when monitoring wells indicate no potential for contamination?
• Which geological process is responsible for the formation of metamorphic rocks?
• What is the primary purpose of radiometric dating in geology?
• Layered intrusives may result from what geological process?
• What is characteristic of the assemblage containing albite, chlorite, actinolite, and calcite?
• What is the in-place granular disintegration product of granite called?
• Which two isotopes are often used for age dating groundwater?
• What is the vertical exaggeration if a cross-section has a horizontal scale of 1:24,000 and a vertical scale of 1 inch equals 1000 feet?
• What does the term ‘fossilization’ refer to?
• What is the process called when sediments are compacted and cemented to form sedimentary rocks?
• Members of the phyllosilicate group include which of the following?
• Which type of metamorphism occurs when rock is subjected to direct heat and pressure?
• If net precipitation entering a drainage basin exceeds the outgoing surface water volume, what does that indicate?
• What can lithostratigraphic sequences help interpret?
• Which trap is not exclusively a stratigraphic trap for petroleum?
• If a well has a drawdown of 27 feet and a theoretical drawdown of 18 feet, what is the well efficiency?
• What is the likely reason for a conflict between a 1975 USGS topographic map and recently acquired geologic data?
• Convergent plate margins are characterized by which of the following?
• How many tons of lignite are contained in a reserve of 1000 acres with beds averaging 20 feet thick, with a specific gravity of 1.28?
• What type of plate boundary is associated with the formation of new oceanic crust?
• What describes the main characteristic of an anticline structure?
• What is the primary function of an aquitard in soil classification?
• What characteristic defines an unconfined aquifer?
• What is the primary force that drives the movement of tectonic plates?
• In which soil horizon would you find hardpan?
• What environmental conditions are most favorable for the preservation of fossils?
• What distinguishes intrusive from extrusive igneous rocks?
• Which type of boundary is characterized by two plates moving toward each other?
• What type of soil is typically found in tropical rainforest regions?
• What does a slug test measure?
• Which of the following contributes to reduced shear strength in a potentially unstable slope?
• In terms of porosity, how do clastic sedimentary rocks generally compare to chemical sedimentary rocks?
• What is the most common factor leading to slope instability?
• Which mineral family produces the most clay minerals during weathering processes?
• What is the primary agent of erosion in a desert environment?
• What type of geological feature is formed by the deposition of rock debris by a glacier?
• What type of rock forms from the cooling and solidification of magma?
• Plagioclase, quartz, biotite, and hornblende would most likely be found in which type of rock?
• What defines the epicenter of an earthquake?
• How is quartz classified in terms of mineral composition?
• What condition does a braided stream usually indicate about its sediment load?
• Which sediment characteristic is considered for age dating in geology?
• What type of geological setting is indicated when a stream is braiding?
• What is the primary rock type that forms from the solidification of magma?
• Which geophysical technique would NOT be useful for investigating a massive sulfide ore body?
• What safety factor (SF) value indicates a stable slope?
• The effects of solution during diagenesis are observable in which of the following?
• Which mineral is commonly recognized as an indicator of metamorphic environments?
• What is the primary concern when collecting duplicate samples for laboratory results?
• What is a geological map used for?
• Which method is commonly used to measure porosity in sedimentary rocks?
• What is the primary outcome of the process of weathering?
• What is the importance of stratified deposits in glacial geology?
• Which of the following rocks makes a poor aggregate for use with Portland cement?
• What is the primary cause of tsunamis?
• What is the name of the supercontinent that existed approximately 300 million years ago?
• What would the specific yield of an unconfined aquifer be if the porosity is 0.3 and the effective porosity is 0.18?
• What is the process by which sediment is laid down in new locations called?
• What is the primary component of the Earth's crust?
• Which factor can increase the porosity of sedimentary rocks?
• Which geological process is primarily responsible for forming mountains?
• What is the term for the age of a rock layer in relation to other rock layers?
• Why is porosity important in geology?
• Within the context of geologic applications, what characteristic does 'efficiency' refer to in well testing?
• Which scale measures the intensity of an earthquake based on its observed effects?
• Which type of fluid can sedimentary rocks with high porosity typically hold?
• What is the difference between magma and lava?
• Which mineral is currently used as an industrial substitute for asbestos?
• Which rocks are commonly formed as a result of volcanic eruptions?
• During the Permian, how would the Kaibab Formation, consisting of sandy limestone, be depicted in a lithologic log?
• A 4:1 (H:V) slope has what grade and slope angle?
• What does high porosity in sedimentary rocks signify about their texture?
• Which of the following is NOT typically a natural constituent of groundwater?
• Which process can enhance the permeability of sedimentary rock?
• Which of the following would NOT be considered an expected origin of a mercury deposit?
• What type of sedimentary rock is often associated with high porosity and permeability?
• A soil material with a porosity of 50% would most likely be classified as what?
• How is limestone containing appreciable amounts of clay represented on a lithologic log?
• What would be the expected sequence of rock units from oldest to youngest for a transgressive sequence?
• How can sedimentary structures provide insight into past environments?
• What are the three main physical properties of rocks logged by wirelines?
• What type of sampler is best for obtaining undisturbed samples from soft sediments?
• What is an uplifted block bounded by normal faults called?
• What is the typical runoff result when water comes into contact with pyrite at the earth's surface?
• Where are the largest volumes of andesite lava usually extruded?
• Which radiometric dating technique is best for determining the age difference between two Miocene-age volcanic ash deposits separated by 500 feet?
• Which type of sedimentary rock is formed from the precipitation of minerals from water?