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GEOL Benoist Test 2
| Question | Answer |
|---|---|
| ______ is a sedimentary rock that is used as an ore of alumninum | bauxite |
| ____ pressure is due to the weight of the overlying rocks and is applied equally in all directions | lithostatic |
| a depositional environment at the foot of a mountain in which poorly sorted, gravel size sediments accumulate is called a/an | alluvial fan |
| a clastic sedimentary rock composed of rounded gravel size clasts is called a | conglomerate |
| rock salt is an example of a/an ____ sedimentary rock | chemical |
| a pedocal is a soil type common in ____ | arid climates |
| a limestone that is metamorphosed due to the application of heat and pressure will form a/an ______ | marble |
| a metamorphic rock with a foliated texture has been subjected to ____ | differential pressure |
| crystal size is the primary criterion used in the classification of a chemical sedimentary rock | false |
| the isostatic gradient is the term that refers to the gradual increase of temperature with depth in the solid earth | false |
| for a clastic sediment composed of feldspar and quartz chemical weathering within a temperature climate should yield a detrital sediment rich in _____ | quartz and clay |
| parallel alignment of mica grains is a common feature of ____ metamorphic rocks | foliated |
| a relatively steep sided volcano with inter bedded lavas and pyroclastics is called a | composite volcano |
| Primary processes in the lithification of a clastic sedimentary rock are | compaction and cementation |
| ripples formed by currents moving in a single direction will be | asymmetrical |
| the b horizon of soil is called the _____ | zone of accumulation |
| the hydrolysis of feldspars involves chemical reaction with _____ | water molecules |
| the sequence of metamorphic rocks from slate to phyllite to schist to gneiss exhibits ___________ | increasing metamorphic grade |
| the zone of metamorphosed country rock surrounding an ignous intrusion is called a metamorphic ______ | laterite |
| Two common cementing compounds of clastic sedimentary grains include _____ | calcite and silica |
| Two enviornmental conditions that increase the rate of chemical weathering include _____ | warmth and wetness |
| an important natural process that facilitates chemical weathering is the formation of _____ by the chemical reaction between water and carbon dioxide | carbonic acid |
| ____ soil forms in wet temperate climates | pedalfer |
| a ____ layer commnly forms in the b horizons of pedocal soils | humus |
| ____ is a type of sedimentary structure formed by deposition from a turbidity current | graded bedding |
| with increasing tempreature and pressure bituminous coal will be transformed into anthracite followed by the transformation of anthracite into graphic | true |
| considering earth's major climate zones where would you expect to find the slowest rate of chemical wearthering | Antarctica |
| Hydrothermal metamorphism of basaltic lavas is prevalent along ____ lithospheric plate boundaries | divergent |
| referring to bowen's reaction series, the minerals most chemically unable at surface conditions are ____ and ____ | olivine/Ca-plagioclase |
| a common chemical breakdown process affecting ferromagnesian minerals at surface conditions is _____ | oxidation |
| common metamorphic minerals include mica garnet and clay | false |
| the formation of _____ is due to repeated eruption of fluid mafic lava flows along crustal fissures | basalt plateaus |
| the most abundant gas emitted by volcanoes is _____ | H2O |
| a felsic magma has high viscosity because SiO4 tetrahedra in the magma have a high tendency to ______ | polymerize |
| an alluvial fan is an example of a transitional depositional environment | false |
| the majority of volcanoes exposed at the surface are found at ____ plate boundaries | convergent |
| the majority of submarine volcanism is concentrated at ______ plate boundaries | divergent |
| ____ is/are one of the greatest volcanic risks to human life | pyroclastic flow |
| the formation of pillow lavas is typical of _______ volcanism | submarine |
| a ____ is a small volcano formed by a single eruption of short duration | a cinder cone |
| the zone of transition from oceanic to continental is called the continental shelf | false |
| an aa lava has a smooth ropy surface | false |
| columnar jointing forms when an intrusive igneous rock cools slowly within the crust | false |
| at surface temperature and pressure, a rock composed of quartz and potassium feldspar will be less chemically stable than a rock composed of CA-rich plagioclase and pyroxene | false |
| the chemical weathering of felspars in crustal rocks releases K, Na, Ca and SiO into solution | true |
| volcanic So gas that is erupted into the upper atmosphere forms a sulfuric acid aerosol. by reflecting sunlight, this aerosol can produce short-term climate cooling | true |
| a soil developed on a clean quartz sandston would be thick and rich in ntrients | false |
| evaporite minerals include calcite, gypsum, and halite | true |
| the most common constituents in weathered soils and sediments are clay minerals, iron oxide, and feldspars | false |
| the primary constituents of a soil include regolith, organic matter, air and water | true |
| an immature sediment contains poorly sorted grains and unstable minerals | true |
| water is an excellent solvent because h2o is a polar molecule | true |
| typically zones of continental regional metamorphism are produced at divergent tectonic plate boundaries | true |