The two main categories of igneous rocks are ____________________ and ____________________. Fill in ...

The two main categories of igneous rocks are ____________________ and ____________________.
 Fill in the blank(s) with correct word

Question 2

The prevailing model for the formation of greenstone beds in the Archean is ____.
 A)igneous intrusion into a sandstone bed
 B)the closing of a back-arc basin
 C)a Wilson cycle
 D)mid-continental rifting
 E)ultramafic lava flows

Question 3

The types of marine deltas that are recognized, based on the relative importance of the processes involved in their formation are ____________________-dominated, ____________________-dominated, and ____________________-dominated.
 Fill in the blank(s) with correct word

Question 4

Most batholiths ____.
 A)assimilate all country rock as they move upward
 B)form during a volcanic eruption
 C)are composed of obsidian and pumice
 D)have a pyroclastic texture and are usually small geological features
 E)were emplaced by forceful injection and stoping as magma moved upward

Question 5

Shield areas of continents are found in modern ____.
 A)subduction zones
 B)continent-continent plate boundaries
 C)tectonically inactive regions
 D)divergent plate boundaries
 E)transform plate boundaries

Question 6

Ridges of alluvium left along a stream's margins by repeated deposition during floods are called ____________________.
 Fill in the blank(s) with correct word

Question 7

Stoping is the process in which ____.
 A)pyroclastic flows are tranformed into obsidian
 B)rising magma detaches and engulfs pieces of country rock
 C)the viscosity of magma changes due to changes in silica content
 D)dikes are formed due to intense heat in the country rock
 E)erosion exposes batholiths