The rocks gabbro or basalt mostly contains:
a) Olivine
b) Pyroxene and calcium-rich plagioclase feldspars
c) Amphiboles
d) Biotite
e) Quartz and potassium feldspar
Ans: b) Pyroxene and calcium-rich plagioclase feldspars
You might also like to view...
Who was responsible for the theory of continental drift?
a. Francis Bacon b. Sir Ernest Shackleton c. Alfred Wegener d. Antonio Snider-Pellegrini
?Benthos consists of bottom-dwellers such as oysters, sea stars, clams, lobsters, and crabs.
Answer the following statement true (T) or false (F)
Large sand grains too heavy to be lifted into the air are pushed forward along the ground surface by the impact of bouncing grains in a process called _____
a. ventifaction b. debris flow c. saltation d. suspension e. surface creep
A thrust fault is ________.
A. a response to horizontal tensional stress B. a strike-slip fault C. a variety of reverse fault D. a variety of a normal fault E. one in which the hanging wall moves down