Sedimentary rocks Flashcards
1
Q
Formation of sedimentary rocks
A
Weathering > erosion > deposition > compaction and cementation
2
Q
How are sedimentary rocks classified?
A
Based on the WAY THEY FORM
3
Q
Clastic
A
Made of weathered bits of rocks and minerals- from physical weathering (shale, sandstone, conglomerate)
4
Q
Chemical
A
Form when dissolved minerals separate from water- chemical weathering (chemical limestone, rock salt)
5
Q
Organic
A
Formed by the shells and skeletons of organisms that settle to the ocean floor (coquina, fossil limestone)
6
Q
Graded bedding
A
When different sizes and shapes of sediment settle to different levels in the rock
7
Q
Cross bedding
A
The slanting of layers in sedimentary rock
