Sedimentary Rocks Flashcards
Sedimentary rocks
pieces of sediment are cemented together
Sediments
sediments are in any body of water
3 types
Clastic
Chemical
Organic
Clastic
fragments of rocks glued together
cemented underwater
Examples of Clastic
Conglomerate
Breccia
Sandstone
Conglomerate
round pebbles/sand glued together
Breccia
sharp, jagged pebbles & gravel glued together
Sandstone
sand-sized particles glued together
quartz
Chemical
acid dissolves minerals
after evaporation the rest of the minerals form rocks
Examples of Chemical
Limestone
Rocksalt
Rock Gypsum
Limstone
fizzes with calcite
strong to acids
Rocksalt
Hailite
Rock Gypsum
Gypsum
Organic
living orgnisms
Organic forms
solid remains of living plants & animals
Examples of Organic
Coal
Coqunia
Fossiliferous Limestone
Coal
from dead plants, trees and animals
Coquina
small pieces of sea shells glued together
Fossiliferous Limstone
has lots of fossils
a type of limstone
Important Features
Stratafiction Fossils Ripple Marks Mud Cracks Nodules & Concretions Geodes
Stratfiction
sediments are left at bottoms of lakes, river or oceans called strata
Fossils
hard remains of plants and animals/past life
Ripple Marks
marks caused by wind/waves on surface of sediments before turning into rocks
Mud Cracks
dry clay cracking
Nodules & Concretions
lumps of silica or calcite
layered
Geodes
hollow spear of silica/calcite crystals
