Textures of Sandstones Warm-Up

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Essay Question

Describe the various statistical measures by which grain-size distribution is defined, and what each measure may indicate regarding the process of transport and deposition. Then, debate the following statement. "Statistical measures of grain-size distribution can be used to uniquely define processes of transport and environment of deposition of siliciclastic sedimentary rocks".

Multiple Choice Questions

According to Folk's concept of textural maturity, which one of the following is the first textural attribute to respond to the sediment transport process?

feldspar

clay matrix

quartz

rounding

rock fragments

sorting

Which of the following is (are) a control on rounding of sand grains?

hardness of the grains

size of the grains

presence or absence of cleavage

energy of transporting medium

viscosity of transporting medium