Sedimentology Stratigraphy Presentation

8/11/2019 Sedimentology Stratigraphy Presentation

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Varian Forturozy

072.11.118


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Sedimentary Rocks

Sedimentary rocks is rocks that formed

from other rocks that have been

weathered, transported, deposited, and

lithificated and become other type of rocksOr,

Formed from organic matter, or chemical

reaction that deposited and lithificatedbefore become rocks.


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Types

Based on rock fragment, there are 2 types:

Clastic rocks, composed of minerals and

rock fragments that were transported by

moving fluids and deposited when thesefluids stopped.

Non Clastic rocks, composed of

chemical reaction deposits or organicmatter which was deposited


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Sedimentation Cycle

Weathering

Transportation

Sedimentation

Compaction

Lithification


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Parts

Rocks fragments, as rocks main

component,

Matrix, as rocks basic mass

Cement, as the filler between fragments

and matrix


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Textures

Colour, the colour of rocks

Grain size, size of grain

Sorting, distribution of grain size

Roundness, the shape of grain

Porosity, a fraction of the volume of

voids over the total volume

Fabric, relation between each grain


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Grain Size


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Sorting


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Roundness


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Structures

Sedimentary structures are classified in 2types:

Primary, formed during sedimentation

Example: parallel lamination, gradedbedding, cross bedding, etc

Secondary, formed after sedimentationfinished

Example: mud cracks, load cast, tracks& trails, etc


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Depositional Environment

There are 3 main types:

Continental, deposited in land or basininside continent. Example: fluvial (rivers),lacustrine (lakes), aeolian (dunes), and

glacier. Transitional, deposited in zone between

continental and marine. Example: delta,beach, tidal, lagoon.

Marine, deposited in sea. The parts aredivided based on depth, example: neritic,bathyal, abyssal


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Thank You

Sedimentology Stratigraphy Presentation

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