Sedimentary Rock Types & Textures

Humboldt State University Department of Geology

Because of copyright restrictions, these slide and overhead transparency files are password protected and limited to use by students enrolled in Geology classes at Humboldt State University

Lecture Slides: Sedimentary Rock Types and Textures

Clastic texture -- gravel: unconsolidated beach sediments (gravel) showing voids between grains. Clastic texture is characteristic of most sedimentary rocks.
Clastic texture -- conglomerate: sedimentary rock made of gravel and sand
Clastic texture -- sandstone: photomicrograph of quartz grains in sandstone. Voids between grains filled with tan-colored calcite cement deposited by groundwater.
Cementation
Conglomerate
Sandstone
Mudstone
Particle-size classification -- table
Well-rounded, well-sorted beach gravel
Well-rounded, well-sorted, beach gravel
Angular, poorly-sorted sandstone -- photomicrograph
Stratification -- redbeds
Cross-bedding -- dunes
Fossil mudcracks
Fossil bivalves
Sedimentary environments -- diagram
Landslide
Slide debris
Landslide deposits
Landslide deposits
Glacier
Glacial deposits (till)
Volcanic mudflow deposits
Alluvial fan
Badwater alluvial fan
Fan surface
Mudflow on alluvial fan
Alluvial fan surface -- Marble Cr. fan
Alluvial fan deposits -- Marble Cr. fan
Alluvial fan surfaces of several ages

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Andre Lehre
Last updated: 4 October 2002

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