Chapter 10 - Geologic Resources Flashcards
1
Q
cumulate
A
layer of dense minerals forming a concentrated deposit on the floor of a magma chamber
2
Q
pegmatites
A
form in magmas containing dissolved water - minerals crystallize and expel water rich in elements
3
Q
placer deposits
A
sedimentary deposits found in stream channels that contain metallic ores
4
Q
grades of coal (low to high)
A
lignite > bituminous > anthracite
