Porphyritic rocks are interpreted to have formed ___

a) under water
b) in mountain ranges
c) along mid-ocean ridges
d) in chill zones
e) through two or more stages of crystallization


Answer: e) through two or more stages of crystallization

Environmental & Atmospheric Sciences

You might also like to view...

Which of the following is NOT a criterion for inclusion as a UNESCO World Heritage site?

A) exhibits high potential to be commercialized B) represents a masterpiece of human creative genius C) represents a unique or exceptional living civilization D) represents a unique or exceptional disappeared civilization E) illustrates a significant stage in human history

Environmental & Atmospheric Sciences

According to Malthus, population increases geometrically, while food supply increases arithmetically. What was the basis for this argument?

What will be an ideal response?

Environmental & Atmospheric Sciences

The most stable predator-prey relationships typically involve communities in which there are

A) many prey species and several natural predators. B) many species of carnivores eating each other. C) only bottom-up population regulation. D) only top-down population regulation.

Environmental & Atmospheric Sciences

Composite volcanoes are often composed of:

a. basaltic lavas b. andesitic lavas c. rhyolitic lavas d. gabbroic lavas

Environmental & Atmospheric Sciences