XXII. Questions (551-600) Flashcards
A line joining points of equal time intervals or ages is known as… a. Isobar b. Isochron c. Isogal d. Isopach
b. Isochron
A landform that has a gentle dip slope on one side, and a steep scarf slope on the other is known as? a. Hogback b. Cuesta c. Cliff d. Wold
b. Cuesta
A lava flow made up of angular blocks and fragments is a/an _________ flow. a. Lava tube b. aa c. Pahoehoe d. Lahar
b. aa
A long, broad, crescent-shaped lake formed when a stream abandons a meander and takes a new course a. Oxbow lake b. Sag pond c. Levee d. Bar
a. Oxbow lake
A long but narrow depression of the seafloor having relatively steep sides. a. Trench b. Trough c. Basin d. Deep
a. Trench or b. Trough
A left-lateral strike slip fault trends SW-NE then at its tip of curvature tends the fault to change its direction due east, then at its point curvature it continues to trend SW-NE direction. What type of basin may form at the point of curvature? a. Successor b. Transpressional c. Pull-apart d. Piggy back
c. Pull-apart
A local earthquake of magnitude 2 is probably not strong enough to be felt by most people, but one of magnitude 4 will be felt by almost anyone who is not moving. How much more ground shaking is represented by a magnitude 4 earthquake than one of magnitude 2? a. about 1.5 times as much b. about 2 times as much c. about 30 times as much d. about 100 times as much
c. about 30 times as much
A limestone formation contains fossils indicating Cambrian to Triassic periods. During what geologic period must have the rock been deposited? a. Cambrian b. Silurian c. Ordovician d. Permian e. Triassic
e. Triassic
A lithostratigraphic mappable unit is a a. Group b. Formation c. Member d. Tongue e. Lens
b. Formation
A limestone contains fossils from Cambrian to present, Jurassic to Cretaceous, and Permian to Tertiary. The limestone must have been deposited during _______ time a. Cambrian b. Jurassic c. Permian d. Tertiary e. Cretaceous
b. Jurassic
A large stream of water that flows across the land is: a. Ocean b. Sea c. River d. Lake
c. River
A layer in which the grain size becomes smaller vertically through the layer is called a. Foliated b. Graded bedding c. Cross-bedded d. Is not observed in nature e. None of these
b. Graded bedding
A landform that results if the diameter of the cap rock is less than the height of the hill above the surrounding terrain. a. Hill b. Ridge c. Butte
c. Butte
A landform that results from differential erosion along a fault plane. a. Fault scarp b. Erosional scarp c. Fault-line scarp
c. Fault-line scarp
A landscape in Java where the terrain was approximately equally shared by conical dolines and conical residual hills. a. Holokarst b. Turmkarst c. Kegelkarst d. Tower karst
c. Kegelkarst
A large-scale intrusive body representing a deeply solidified magma chamber is called a what? a. Sill b. Dike c. Batholith d. Laccolith e. Volcanic neck
c. Batholith
A lava flow with a smooth, ropy surface is termed: a. Spatter cone b. Lapilli c. Pahoehoe d. Pillow lava e. Vesicular
c. Pahoehoe
A layer of Earth materials that inhibits the movement of groundwater is a(an): a. Geyser b. Dripstone c. Cone of depression d. Aquiclude e. Capillary fringe
d. Aquiclude
A left-lateral strike-slip fault is also called a dextral fault.
False
A lava with 50 wt.% SiO2 is a. Gabbroic b. Andesitic c. Dioritic d. Basaltic e. Dacitic
d. Basaltic
A line in a map representing a horizon a. Contour map b. Contour line c. Structural map d. Geologic map
b. Contour line
A long desert dune oriented parallel to the prevailing wind is a a. Parabolic dune b. Barchan c. Playa d. Transverse dune e. Longitudinal dune
e. Longitudinal dune
A light-colored, coarse-grained intrusive rock consisting primarily of quartz, K-feldspar and/or Na-plagioclase.
Granite
A law that states that strain is proportional to stress. a. Ohm’s law b. Newton’s law c. Faraday’s law d. Hooke’s law
d. Hooke’s law
A line occupying the lowest line of a fold. a. Crest b. Axial plane c. Shanks d. Trough e. None of the above
d. Trough
A map with a bar scale of 2 cm = 50 meters would have a scale expressed in ratio of: a. 1:25,000 b. 1:250 c. 1:2,500 d. 1:5,000 e. none of the above
c. 1:2,500
A low-angle fault dipping less than 45° reverse fault where hanging wall overhangs the footwall is termed as? a. Reverse fault b. Klippe c. Thrust d. Horst
c. Thrust
A method involving collecting and analyzing various types of geological materials or certain biological materials for the delineation of mineralization is called ______ a. Geochemical sampling b. Geostatistics c. Geological assessment d. Mining e. None of the above
a. Geochemical sampling
A material that undergoes a large plastic deformation before rupture is described as a. Malleable b. Ductile c. Elastic d. Brittle
b. Ductile
A low-grade metamorphic rock buried deep within the Earth undergoes extreme heat and melts. Upon cooling, it becomes: a. A high-grade metamorphic rock b. An igneous rock c. A sedimentary rock d. A cataclastic rock
b. An igneous rock
A mineral Al2SiO5 that forms at high temperature is: a. Kyanite b. Olivine c. Sillimanite d. Anorthite
c. Sillimanite
A magma of 68% silica (SiO2) content crystallizes deep underground. Typical minerals you would expect in the resulting rock would include: a. Olivine, pyroxene and calcium plagioclase b. Clays, hematite, limonite c. Quartz, muscovite, orthoclase, and sodium plagioclase feldspar d. No minerals would form
c. Quartz, muscovite, orthoclase, and sodium plagioclase feldspar
A map has a scale of 1:100000. Two points A and B on the map are 10 cm apart. The actual ground distance between them is ________ m. a. 1,000,000 b. 100,000 c. 10,000 d. 1,000 e. 100
c. 10,000
A marine sedimentary environment comprising the seafloor from 600 to 13,500 feet is called: a. Hadal b. Bathyal c. Abyssal d. Sublittoral
c. Abyssal
A magnitude 8.8 earthquake occurred on Chile in? a. February 27, 2010
a. February 27, 2010
A meander bend that is physically isolated from the main stream is called: a) Cut-off meander b) Oxbow lake c) Abandoned channel
b) Oxbow lake
A major fossil group used for dating and correlation of Cambrian strata is: a. Foraminifera b. Trilobites c. Conodonts d. Fusulinids e. Mollusks
b. Trilobites
A metamorphic rock that has undergone partial melting to produce a hybrid metamorphic-igneous rock is called: a. Schist b. Migmatite c. Hornfels d. Gneiss
b. Migmatite
A map of global earthquakes and volcanoes tells you: a. Where the edges of the continents are b. Where the Earth is the hottest c. Nothing, it looks random d. Where the plate boundaries are
d. Where the plate boundaries are
A meandering stream has: a. A single, sinuous channel b. Long, straight stretches and waterfalls c. A radial pattern d. A dendritic drainage pattern e. Alluvial fans along its course
a. A single, sinuous channel
A measure of earthquake strength based on the maximum wave amplitude recorded by a seismograph: a. Magnitude b. Seismicity c. Intensity d. Shear strength e. Shear stress
a. Magnitude
A magmatic island arc forms at a converging ocean-continent boundary.
True
A measured reserve can be defined if: a. Ore is partially blocked on some sides b. Ore is blocked on all sides c. Blocked based on scanty drillhole data d. Blocked based on geologic inference e. None of the above
a. Ore is partially blocked on some sides
A mineral deposit consisting of a zone of veins is called: a. Manto b. Vein c. Lode d. Stratiform e. Stratabound
c. Lode
A method of discovery normally limited to visual examination of either the exposure (outcrop) of the deposit or of the loose fragments (floats) that have weathered away from the outcrop: a. Direct b. Indirect c. Grasshopper d. Surface
a. Direct
A low-magnesium limestone containing clay is called: a. Lime b. Portland cement c. Cement rock d. Phosphate rock
c. Cement rock
A massive type of copper deposit that is tabular, occurs in fractures and in the matrix of tectonic breccias: a. Hydrothermal vein b. Contact metasomatic c. Metamorphogenic d. Porphyry
d. Porphyry
A low-permeability unit that forms either the upper or lower boundary of a groundwater flow system: a. Aquifer b. Aquitard c. Aquiclude d. Aquifuge
b. Aquitard
A low-relief coastline with barrier islands, lagoons, and estuaries is characteristic of: a. Arctic coasts b. Submergent coasts c. Tectonically active coasts d. Tropical coasts e. Emergent coasts
b. Submergent coasts
A measure of a stream’s ability to transport particles based on size rather than quantity: a. Capacity b. Competency c. Cubage d. Capability
b. Competency
