GLGY 307 Lecture Notes - Lecture 4: Ooid, Lithification, Mudflat
12 Oct 2017
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Lecture 4: how an organism becomes a fossil. Trace fossils: beetle traces: moving trances of an insect (scoyenia, flying traces: multiple looping trails generated by a flying insect caught on surface with a thin film of mud or water. Sedimentary rock classification: detrital (clastic, siliciclastic, chemical (precipitated, chemically precipitated, biochemical (formed through organic activity or accumulation of fragments of dead organisms. Transport (sediment: landslides & rockfalls, eolian transport (transport media = wind, glacier transport (transport media = ice, stream & river transport (transport media = continental water, wave & current transport (transport media = oceanic water) Main types of carbonates: subaerial carbonates, reefs & other organic buildups, oolites, carbonate banks & shoals, carbonate mud deposits, chalks. Reefs & other organic buildups: wave resistant buildups are commonly referred to as reefs. 3: those organic buildups that are not wave resistant are referred to as banks or bioherms, the use of the term reef" is somehow equivocal.
