Igneous rock usually appears with a well mixed texture without fossils, bands or layers, may contain vesicles (air bubbles or holes from trapped gases) and does not react with dilute acid.
Igneous rocks can:
Be glassy or frothy in appearance.
Be felsic, intermediate, mafic, or ultramafic in nature.
Be porous or full of bubbles.
Have large crystal structure like granites.
Have small crystal structure like basalts.
Have a combination of large and small interlocked crystals.
Be more dense than other rock types.
Have an interlocking crystalline structure.
Appear to be peppered with black specks.
Be light enough to float (pumice).
Igneous rocks run the gamut from white to black, glassy to coarse-grained.
In addition to having small crystals, an extrusive igneous rock can:
Be glassy or frothy in appearance.
Be felsic, intermediate, mafic, or ultramafic in nature.
Be porous or full of bubbles.
Be light enough to float (pumice).
1. Crystalline in nature. 2. Do not contain fossils. 3. Mostly hard and massive. 4. Do not occur in beds. 5. High resistance to weathering and erosion.
In my science class my science teacher says usually small crystals
Volcanic or Extrusive Rocks cool rapidly at the earth’s surface.
Extrusive igneous rock can be: fine-grained/glassy in texture or vesicular - when compared to intrusive igneous rock.
lava or magma
Small Crystals are one similarity
y
There are so many rocks that can be classified as not a common extrusive igneous rock. The most common extrusive igneous rock is basalt. Extrusive rocks are formed as a result of lava solidifying.
Rhyolititcen rocks.
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
extrusive igneous rocks =/
Extrusive igneous rocks.
There are so many rocks that can be classified as not a common extrusive igneous rock. The most common extrusive igneous rock is basalt. Extrusive rocks are formed as a result of lava solidifying.
calcite
Rhyolititcen rocks.
Extrusive igneous rocks.
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
Igneous rocks are formed from the cooling and solidifying of magma. The resulting rock can be instrusive (magma cooling within the crust) and extrusive (lava cooling on the surface). The most common kind of rocks are Granite (intrusive) and Basalt (extrusive).
extrusive igneous rocks =/
Extrusive igneous rocks are usually fine grained.
Extrusive igneous rocks , Intrusive igneous rocks
Yes. Volcanic rocks are extrusive igneous rocks.
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Extrusive igneous rocks i think are used for carving and awesome things like that!