Scoria is a volcanic igneous rock that is composed of approximately 50% silica and 10% calcium oxide and lesser contents of potash and soda. Its hardness on the Mohs scale is 5 - 6.
Scoria is a volcanic rock, basaltic in composition. It is a Greek word meaning cinder
no
Fine grained rock exhibits a non-visible or nearly non-visible crystalline structure on a fractured surface. On the opposite end, a coarse grained rock exhibits mineral crystals of the rock's constituents on a fractured surface. The larger the crystals, the coarser grained is the rock. Basalt would be an example of a fine grained rock. Granite would be an example of a coarse grained rock.
fine grained rock will weaher faster thatn the course grained rock
Metamorphic rock can be coarse grained or fine grained.
Yes. Fine grained means the grains in the rock are very small. The smaller the grains, the smoother the rock.
Coarse grained, Medium grained, and fine grained.
It is fine grained to glassy and contains vesicles.
Fine grained rock exhibits a non-visible or nearly non-visible crystalline structure on a fractured surface. On the opposite end, a coarse grained rock exhibits mineral crystals of the rock's constituents on a fractured surface. The larger the crystals, the coarser grained is the rock. Basalt would be an example of a fine grained rock. Granite would be an example of a coarse grained rock.
scoria
fine grained rock will weaher faster thatn the course grained rock
Yes. Exactly, they do have both, fine grained and coarse grained rocks.
fine grained or coarse grained
Metamorphic rock can be coarse grained or fine grained.
Coarse
when the lava cools quickley it is fine-grained
Metamorphic rock can be coarse grained or fine grained.
Yes. Fine grained means the grains in the rock are very small. The smaller the grains, the smoother the rock.
Coarse grained, Medium grained, and fine grained.