True mammals evolved from ____________________, which were the most mammal-like of group of
____________________, which were mammal-like reptiles. Fill in the blank(s) with the appropriate word(s).
cynodonts; therapsids
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When radiometric dating is applied to metamorphic rocks, the date obtained is:
a. the date of final crystallization of the magma. b. the date at which metamorphism began. c. a minimum age for the parent rock. d. the date at which metamorphism ceased. e. a maximum age for the daughter rock.
Which of the following statements is NOT true about clastic sedimentary rocks?
A. The amount of pore space decreases as a sand is compacted into sandstone. B. To be called a sandstone, quartz must make up more than 95 percent of the grains. C. The natural cement that holds sedimentary rocks together is composed of dissolved minerals that precipitate. D. Clasts in a conglomerate or breccias can be different rock types or can be all the same rock type.
A good example of a drowned coast is the:
a. California coast b. Florida coast c. Norwegian coast d. mid-Atlantic coast
The tallest mountain ranges are created at transform boundaries.?
a. True b. False