C. weathered remains of other rocks
Sedimentary rocks are primarily formed from the accumulation and lithification of weathered remains, or sediments, of existing rocks.
Which of the following is the raw material from which sedimentary rocks are formed?
A.
lava from volcanic eruptions
B.
magma from the mantle
C.
weathered remains of other rocks
D.
none of these
3 answers
Sand on a beach is covered by other layers of sand over time. The extra layers compress the first layer, packing it tighter and tighter. Over time, the bottom layers of sand have formed into sandstone, with colored bands showing the different layers.
What kind of rock can sandstone be classified as?
A.
igneous rock
B.
sedimentary rock
C.
volcanic rock
D.
metamorphic rock
What kind of rock can sandstone be classified as?
A.
igneous rock
B.
sedimentary rock
C.
volcanic rock
D.
metamorphic rock
B. sedimentary rock
Sandstone is classified as a sedimentary rock, as it is formed from the accumulation and compaction of sand grains over time.