Categories: All - sedimentary - chemical - deposition - weathering

by Seto Seto 5 years ago

202

Classifying Sedimentary Rocks

Sedimentary rocks are classified into three main types: organic, clastic, and chemical. Organic sedimentary rocks form from the accumulation of carbon-containing organic debris and often contain calcite.

Classifying Sedimentary Rocks

SEBASTIEN SETO

COAL

DOLOMITE GYPSUM LIMESTONE

Stratification is a visible feature of sedimentary rocks. They are the layers you can see as the different types of sediment

CLASTIC ROCKS

SHALES

SANDSTONES

CONGLOMERATES

"Glue" holding the Clastic rocks together is either Calcite, iron oxide, or silica

PRODUCTS OF WEATHERING

QUARTZ

CLAY

CALCIUM CARBONATE/CaCO3

Classifying Sedimentary Rocks

TYPES OF SEDIMENTARY ROCKS

ORGANIC SEDIMENTARIES
Form from accumulation of organic debris (carbon containing) Contain Calcite
CHEMICAL SEDIMENTARIES
Form when mineral constituents in solution become supersaturated and inorganically precipitate.
CLASTIC
MATRIX

Mud/ grained sediment surrounding clasts

CLASTS

Large pieces of sand or gravel

Form from weathering products that don't dissolve in water

HOW ARE THEY FORMED

CEMENTATION
Precipitation of mineral matter in the space of the grains , holding the grains together
COMPACTION
The new minerals are overlayed, forcing forcing grains together
DEPOSITION
Sediment accumulates in a deposit area from a source area
WEATHERING
Igneous rock is broken down to form new minerals