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22 Cards in this Set

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  • Back
3 most prevalent critters that commonly comprise chert
diatoms, radialarians, spicules
chert
microcrystalline quartz
3 sed structures common to meandering river
ripples, trough cross bedding, laminations
most common sed structure found in and the most common texural characteristic of eolian deposits
large scale trough cross bedding, very well sorted
distinguish a mudstone from a shale
fissility
diagenesis
any change to a rock after deposition
provenance
source of siliciclastic sediment
4 most common types of minerals in carbonate rocks
Aragonite, high mg calcite, low mg clacite, colomite
what element differentiates calcite from dolomite?
Mg
3 major processes operating on the coast
waves, tides, currents
4 types of coal and the precursor
Bitumen - massive amounts of organic material with extremely high water content

Peat - high water content, with loose oragnic material

lignite - dull brown/black. still some organics less water more C

Bituminous - alternating layers of light and dark. low moisture content

anthracite - shiny, black concoidal fracture. highest grade. almost no moisture or trace of organics
features for a profile through a common beach
back-shore - dunes. well above avg water hieght and only sees water in storms. large scale trough cross bedding along with dune features like desert pavement

fore-shore - wave breaking point. high energy some under water some above. laminations prevalent with some ripples as well

shoreface - always under water, plant and animal life. prevalent corals. some ripples
classification system for carbonaceous sediments covered in class is based on the relative proportions of what 3 things?
saprolite, humulith, pelite
3 common deposits found within alluvial fans
mudflow,braided river, debris flow
crevasse splay
fine sand overcomes the hieght of the levee and is rapidly deposited on the landward side due to a sudden drop in velocity and increase in surface area of available land
characteristics of till deposits
poorly sorted, cracks in minerals, etchins, fine matrix
IRD
ice rafted debris
increasing pressure on grains within rocks causes partial dissolution of grains at grain contact
pressure solution
allochem
carbonate clast, ooid, peloid, aggregate grain, skeletal particle
microcrystaline calcite or mud
micrite
sparry calcite
crystals growing between carbonate grains
3 basic types of anhydrite based on fabric and bedding
nodular, laminate, massiv