Exam 6: Pages of Earths Past: Sedimentary Rocks

Which environment would most likely produce sedimentary deposits characterized by poorly to moderately sorted,angular to subangular grains that consist of feldspar,quartz,and lithics (rock fragments)?

Which transport medium carries the largest particles?

A fine-grained clastic rock that splits into thin sheets is ____________.

If evidence of cross bedding was discovered on a barren planet such as Mars,what could you assume was once occurring on the planet?

Clastic sedimentary rocks are primarily classified on the basis of ____________.

What do hot springs,the immense salt layers beneath the Mediterranean Sea,and Native American tools and weapons have in common?

When limestone becomes chemically altered so that half of the calcium atoms are replaced by magnesium,the resultant rock is termed ____________.

Diagenesis requires ____________.

What causes the formation of an alluvial fan?

Compaction and cementation of grains occurs during ____________.

What type of sediment is found in lake bottoms?

Chemical weathering takes place most rapidly in environments that are ____________ and ____________.

Ripples,dunes,and cross bedding are sedimentary structures that can be used to help determine _____________.

It is unusual for ____________ to carry grains larger than sand.

Physical precipitation of gypsum due to evaporation of seawater produces which kind of sedimentary rock?

Death Valley,part of the Basin and Range Province,has been sinking partially due to the weight of continuously accumulating sediment shed from the Black and Panamit Mountains that border the valley.What phenomenon is this an example of,and what depositional environment is created by the sediment deposition?

Sea level rises locally,and marine sediments are deposited on top of terrestrial sediments during events termed ____________.

Pulling a block of clay apart,resulting in the middle portion thinning and sinking,is an adequate analogy for ___________.

The removal of detritus from weathered rock at an outcrop is termed ____________.

Waves cause beach sand to be ____________.