7_Sedimentary[1]

7_Sedimentary[1] - Sediments and Sedimentary Rocks A...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Sediments and Sedimentary Rocks A Surface Veneer Weathering • The formation of sediment • Processes that break- up and dissolve rock weathered rock • Mechanical/Physical : break, crack • Chemical : dissolve, corrode fresh rock Types of Sedimentary Rocks Detrital (clastic) – Cemented together fragments & grains of preexisting rock – Clast from klastos Chemical (non-clastic) – Minerals that precipitate directly from solution Biochemical – Made from shells of organisms Organic – Carbon-rich relicts of plants
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Mechanical Weathering • aka physical weathering • Breaks rocks into smaller grains or chunks Detritus and Clasts : the weathered pieces Grain Size Classification coarse medium fine (used to categorize detrital sed. rocks)
Background image of page 2
3 Other groupings of sedimentary rocks based on composition • Siliceous – Contains quartz •A r k o s e Contains feldspa – Contains feldspar • Carbonate – Contains calcite or dolomite • Argillaceous – Contains clay Making Detrital/Clastic rocks weather and erosion
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 23

7_Sedimentary[1] - Sediments and Sedimentary Rocks A...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online