Group 2 Eng. Geology-Igneous rock

      Ultramafic rocks are also known as

•   Ultramafites

• Ultrabasic rock

• Ultramafolites

• None of the above

     Which type of rocks are mostly dark in color

• Mafic rock

• Felsic rock

• Ultramafic rock

• None of the above

     In geology, Felsic is a modifier describing ……..rock

• Sedimentary

• Metamorphic

• Igneous

• None of the above

      When a lava comes out of a volcano and solidifies into extrusive igneous rock it can be referred to as…….

• Magma

• Volcanic

•   Lava

• None of the above

      The two main categories of igneous rocks are

• Intrinsic and extrinsic rock

• Extrusive and intrusive rock

• All of the above

• None of the above

      The word Aphanitic in Greek means

• Visible

• Clear

• Invisible

• None of the above

1.      Which type of igneous rock has typically green to black Dunite

• Mafic rock

• Felsic rock

• Ultramafic rock

• None of the above

     An intermediate rock has a silica percentage of

• 60%

• 63%

• 64%

• 65%

1.      In igneous petrology, an intermediate composition refers to the chemical composition refers to the chemical composition of a rock that has ……..wt% SiO₂

• 56-65

• 50-70

• 40-63

• 52-63

1.      Mafic rocks includes the following excerpt

• Basalt

• Diabase

• Gabbro

• None of the above