search
arrow-left Previous
Next arrow-right
Q: Which of the following rocks are important to geotechnical engineers because they cover about 75% of the earth's surface area?
  • A. Sedimentary
  • B. Metamorphic
  • C. Igneous rocks
  • D. All of these
Correct Answer: Option A - Sedimentary rock are also known as aqueous or stratified rocks. The various weathering agencies, e.g. sun, air, frost etc. Ex-sandstone, limestone, dolomite, shale etc. • Metamorphic rocks are formed from igneous or sedimentary rocks as a result of the action of the earth movements, temperature changes, liquid pressure etc. Ex- Gneiss, quartzite, marble, schist etc. • Igneous rocks also known as primary, un-stratified or eruptive rocks are of volcanic origin and are formed as a result of solidification of molten mass lying below or above the earth's surface. Ex-Granite, rhyolite, syenite.
A. Sedimentary rock are also known as aqueous or stratified rocks. The various weathering agencies, e.g. sun, air, frost etc. Ex-sandstone, limestone, dolomite, shale etc. • Metamorphic rocks are formed from igneous or sedimentary rocks as a result of the action of the earth movements, temperature changes, liquid pressure etc. Ex- Gneiss, quartzite, marble, schist etc. • Igneous rocks also known as primary, un-stratified or eruptive rocks are of volcanic origin and are formed as a result of solidification of molten mass lying below or above the earth's surface. Ex-Granite, rhyolite, syenite.

Explanations:

Sedimentary rock are also known as aqueous or stratified rocks. The various weathering agencies, e.g. sun, air, frost etc. Ex-sandstone, limestone, dolomite, shale etc. • Metamorphic rocks are formed from igneous or sedimentary rocks as a result of the action of the earth movements, temperature changes, liquid pressure etc. Ex- Gneiss, quartzite, marble, schist etc. • Igneous rocks also known as primary, un-stratified or eruptive rocks are of volcanic origin and are formed as a result of solidification of molten mass lying below or above the earth's surface. Ex-Granite, rhyolite, syenite.