XV. Questions (400-425) Flashcards
A crater filling of lava whose surrounding material has been removed by erosion is known as? a. Volcanic plug (or volcanic neck) b. Volcanic neck c. Volcanic vent d. Volcanic reef
a. Volcanic plug (or volcanic neck)
A concentration of naturally occurring solids, liquids or gaseous material in or on the earth’s crust in such form and amount that economic extraction of a commodity from the concentration is potentially feasible is called: a. reserve b. resource c. mine commodity d. recoverable ore e. none of the above
b. resource
A coarse-grained acid rock consisting of quartz (20-40%), alkali feldspar and various ferromagnesian minerals, dominantly hornblende and biotite; apatite and magnetite are most common accessory minerals. a. Diorite b. Andesite c. Granodiorite d. Dacite
c. Granodiorite
A colorless, transparent to translucent variety of K-feldspar which is commonly found in pseudo-orthorhombic crystals: a. Baveno b. Manebach c. Adularia d. Moonstone e. None of the above
c. Adularia
A continuous or broken circle of coral reef and low coral islands surrounding a central lagoon o shoal o atoll o bioherm o tombolo
o atoll
A contact metamorphic zone that extends out approximately 10 centimeters from an adjacent igneous intrusion is most likely going to be next to a. small dike or sill b. stock c. batholith d. laccolith
a. small dike or sill
A coastal landform with wide sandy beaches is: A) Peninsula; B) Barrier island; C) Plain; D) Valley
B) Barrier island
A coarse-grained igneous rock composed of pyroxene, olivine, and Ca-plagioclase is called: a) gabbro b) andesite c) basalt d) rhyolite
a) gabbro
A conglomerate with relatively little fine material was probably deposited by a) running water b) flowing ice c) debris flows d) ocean currents
a) running water
A cone of depression in the water table results from a) excess rate of pumping b) excess volume of pumping c) any significant amount of pumping d) defective pump
a) excess rate of pumping
A complex organogenic framework of calcium carbonate (primarily of corals), which forms a rocky eminence on the sea floor and customarily grows upward to the tide limit. a) Coral Reef b) bioherm c) planktons d) a and b
d) a and b
A crack in the rocks along which no significant movement has occurred is called __________.
Joint
A collision between two pieces of continental crust at a convergent boundary produces a: A) Mid-ocean ridge; B) Deep-ocean trench; C) Rift valley; D) Mountain range
D) Mountain range
A cone of depression forms when: A) A stream flows into a sinkhole; B) Water in the zone of aeration is replaced by water from the zone of saturation; C) The ceiling of a cave collapses, forming a steep-sided crater; D) A spring forms where a perched water table intersects the surface; E) Water is withdrawn from a well faster than it can be replaced
E) Water is withdrawn from a well faster than it can be replaced
A crescent-shaped dune whose tips point downwind is a ___ dune: A) Star; B) Parabolic; C) Transverse; D) Barchan; E) Longitudinal
D) Barchan
A complete ophiolite is not found in a) Palawan b) Tacloban c) Angat d) Mindoro e) Isabela
b) Tacloban
A concentration of naturally occurring solids, liquids or gaseous material in or on the earth’s crust in such a form and amount that economic extraction of a commodity from a concentration is currently of potentially feasible is a. Mineral occurrence b. Positive ore c. Undiscovered mineral occurrence d. Resource e. None of the above
d. Resource
A concordant intrusive confined to the crest of anticline or to troughs of syncline is a. Laccolith b. Lopolith c. Phacolith d. Bysmalith e. none of the above
c. Phacolith
A collection of processes that causes rocks to spall off into thin, curving layers is a. Sheeting b. Wedging c. Heaving d. none of the above
a. Sheeting
A complete ophiolite suite is presently known to contain a. PGE b. Nickel-copper sulphides c. Refractory chromite d. Uvarovite e. All of the above
e. All of the above
A colorless, translucent to transparent variety that occurs mainly in low temperature veins in gneisses and schists a. Sienna b. Adularia c. Oligoclase d. Sanidine
b. Adularia
A coarse-grained plutonic intermediate rock consisting essentially of intermediate plagioclase feldspar and one or more ferromagnesian feldspar minerals, quartz present in small quantities a. diorite b. gabbro c. basalt d. granite
a. diorite
A confined aquifer is: a) An absolutely impermeable unit that will neither store nor transmit water b) A region of unsaturated zone where the soil may be locally saturated because it overlies a low permeability unit c) An aquifer overlain by a confining bed having significantly lower hydraulic conductivity than the aquifer. d) A low-permeability unit that forms either the upper or lower boundary of a ground-water flow system
c) An aquifer overlain by a confining bed having significantly lower hydraulic conductivity than the aquifer.
A contact twin that describes if the compositions surfaces are parallel to one another. Plagioclase commonly shows this type of twinning, called the Albite Twin Law, with {010} as the twin plane. Such twinning is one of the most diagnostic features of plagioclase. a. Penetration twin b. Contact twin c. Polysynthetic twin d. Cyclical twins
b. Contact twin
