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Lecture 7

Lecture 7 - Sedimentary Rocks.pdf

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Department
Earth Sciences
Course
EARTHSC 1G03
Professor
Carolyn Eyles
Semester
Fall

Description
Envir Sc 1G03: Earth & the Environment Sedimentary Rocks and the Local Area Field Trip Outline ‡ Introduction ± the rock cycle ‡ Sediments ‡ Sedimentary rocks ‡ Depositional environments ‡ Stratigraphy ± Naming of rock units ‡ Field Trip Introduction: the rock cycle Igneous, sedimentary & metamorphic rocks Change from one type to another with time What are sediments? Sediments: 1. 2. !"#$%& '("%$&)%#$&*%+",&-$%.& http://www.geo.uu.nl/fg/palaeogeography/researchprogram What are sedimentary rocks? Clastic sedimentary rocks Non clastic sedimentary rocks conglomerate How do sediments change into sedimentary rocks? Sediments become : ‡ - ‡ - &!/%0"1"2/2& ͻ !"#$%&'($%))) ) ͻ )))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))34#42$41"&&& ) )) ͻ )) ) 5602& Clastic Sedimentary Rocks Clastic sediment ‡ ‡ Clastic Sedimentary Rocks ‡ ‡ Clastic Sedimentary Rocks Classified according to the Clastic Bioclastic < 0.0039 mm Mudstone Shale Micrite 0.0039 - 0.0625 Siltstone Calcisiltite 0.0625 - 2 mm Sandstone Calcarenite > 2 mm Conglomerate Calcirudite Chemical Sedimentary Rocks ‡ ‡ ‡ '("%$&)%#$&*%+",&-$%.& 7%#/$"&& ͚ƌŽĐŬ▯&ƐĂůƚ͛& Depositional Environments The grain size of sedimentary rocks ± ± Braided river ± sands & gravels
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