The rocks brought back to Earth from the moon fall into four categories: mare basalts, impact breccias, pristine highland rocks and regolith. Basalts are igneous rocks formed by co...
The three main types of rocks are igneous, metamorphic, and sedimentary.
Names of non-rock types and archaic rock types are given as appendices. ... 1
Igneous; 2 Sedimentary; 3 Metamorphic; 4 Specific varieties of rocks; 5 See also
Types of Rocks. Rocks are not all the same! The three main types, or classes, of
rock are sedimentary, metamorphic, and igneous and the differences among ...
Answer: There are many grades of live rock
to choose from, but for the most part aquarists look for rock
that allows for maximum marine life and coralline algae growth.
Keep in mind that live rock
is normally sold by weight, so the more porous the rock
is, the more roc
... More »
Photographs and information for a large collection of igneous, metamorphic and
sedimentary rocks. Geology.com.
Just as any person can be put into one of two main categories of human being,
all rocks can be put into one of three fundamentally different types of rocks.
To help you identify the types of rocks in your collection, let's look at the
characteristics that make up the three types. First, we will look at igneous rocks.
Did you know that lava is molten rock that reaches the earth's surface?
Furthermore, did you know that rocks exist in three general forms: igneous,...
There are three different types of rocks: Igneous, Sedimentary, and Metamorphic.
The difference between each type is in how they are formed.