Which of the following statement is the best description of breccia?
A. hard, nonfoliated rock resulting from contact metamorphism
B. composed of alternating bands of light and dark silicate minerals
C. loosely coherent rock composed of broken fragments that formed along a fault zone
D. calcite-rich, often nonfoliated
查看答案
Which of the following statement is the best description of marble?
A. represents a metamorphic grade between slate and schist
B. very fine-grained and foliated with excellent rock cleavage
C. calcite-rich, often nonfoliated
D. loosely coherent rock composed of broken fragments that formed along a fault zone
Which of the following is the most appropriate description of the slaty cleavage?
A. shiny, planar alignment of mica to form a foliation
B. closely-spaced planar surfaces along which rocks split into thin, tabular slabs when hit with a hammer
C. a small number of very large crystals surrounded by the finer-grained rock
D. a banded foliation resulting from a segregation of minerals
Where is the probable location that the regional metamorphism most likely occurs:
A. in close association with a mid-ocean ridge
B. within mountain belts as they form from continental collision
C. in close proximity to a pluton or cooling magma body
Which of the following is the most appropriate description about the gneissic structure?
A. closely-spaced planar surfaces along which rocks split into thin, tabular slabs when hit with a hammer
B. a small number of very large crystals surrounded by the finer-grained rock
C. shiny, planar alignment of mica to form a foliation
D. a banded foliation resulting from a segregation of minerals
微信支付 
支付宝支付