Two rock units are sitting one on top of the other. The lower rock unit is grani

Question

Two rock units are sitting one on top of the other. The lower rock unit is granite. The upper rock unit is sandstone. The sandstone shows no signs of contact metamorphism. What type of contact is present between the granite and the sandstone? a. Disconformity b. Nonconformity c. Angular unconformity d. None of the above Two rock units are sitting one on top of the other. The lower rock unit is sandstone. The upper rock unit is shale. There are major signs of erosion sitting between the two rock units. What type of contact is present between the sandstone and the shale? a. Disconformity b. Nonconfornity c. Angular unconformity d. None of the above A layer of sandstone has been offset by a fault in a vertical direction. What type of fault would this be from the choices below? a. Dip-slip fault b. Strike-slip fault The San Andreas fault is a: a. Dip-slip fault b. Strike-slip fault Disconformities can involve the rock unit granite. a. True b. False Nonconformities can involve the rock unit granite. a. True b. False New Orleans flooded during Hurricane Katrina due to levee failure. a. True b. False The hydrologic cycle is driven primarily by solar energy. a. True b. False The greater the water content of rock, the lower its melting point. a. True b. False

Explanation / Answer

Answer 23 - nonconformity

A nonconformity is a kind of unconformity which exists between the crystalline rocks and sedimentary rocks. Here the sedimentary rocks are underlined by either igneous or metamorphic rock masses.

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