Valuable ore deposits and gem crystals are often associated with _____.
a. oceans
b.oil deposits
c. thin crustal areas
d. igneous intrusions
Which of the following shows a possible sequence that leads to the formation of sedimentary rocks?
a. squeezing, heating, bending, folding
b. rising, weathering, erosion
c. weathering deposition, compaction, cementation
d. melting, cooling, crystallization
PLZ HELP!! :)
For the first question:
Valuable ore deposits and gem crystals are often associated
with igneous intrusions. So for this question the correct option is option “d”.
An example like the Pegmatite’s, which are a form of igneous intrusions, is
responsible for the creation of variety of gems like topaz and tourmaline.
For the second question:
For this specific question, option “c” seems to be the
correct option. Weathering, deposition, compaction, cementation are the
possible sequence that leads to the formation of sedimentary rocks.
Answer:
for the first one its D.
For the second one its C.
There you go.