Meandering Streams Warm-Up

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Essay Question

Use Walther's Law to explain the development of the vertical facies succession of a meandering stream deposit. In order to do this, you must start with the lateral distribution of contemporaneous environments, then consider the effect of the lateral migration through time.

Multiple Choice Questions

Which of the following is more common in meandering streams than in braided streams?

lateral accretion surfaces capped by overbank deposits

coal seams with overlying incised channel deposits

thick deposits of gravel

many gravel and sand-filled channel scours which truncate one another

abundant ripple cross lamination and climbing ripple lamination in fine-grained sandstone near the top of an aggrading sequence

repeated stacking of tabular sets of planar cross beds attributed to the growth and migration of transverse bars

Which of the following controls the pattern of lateral migration or shift in meandering channels?

erosion of the outer bank of a meander bend and concurrent deposition of point bar sediments on the inside bend

crevassing of the levee during floods

development of clay plugs in abandoned meander bends

the pattern of helical or spiral flow developed in a meandering channel

meander neck cutoff during floods

avulsion during floods