Types of Rocks
What is an igneous rock?
formed from cooled magma.
What is the first step in the rock cycle?
Crystallization
What is an Igneous rock made of?
melted rock material, or magma, that lies beneath Earth's surface
What rocks are fossils found in?
sedimentary and occasionally fine-grained, low-grade, metamorphic rocks
How old is the Igneous rock?
4.6 billion years
What is an Sedimentary rock?
formed from pre-existing rocks or pieces of once-living organisms.
What is the second step in the rock cycle?
Cooling
What is a Sedimentary rock made of?
pieces of pre-existing rocks
What rocks are fossils not found in?
Igneous rock
How old is the Sedimentary rock?
3.8 billion years old
What is an metamorphic rock?
formed when rocks are subjected to high heat, high pressure, hot mineral-rich fluids.
What is the third step in the rock cycle?
weathering
What is an metamorfic rock made out of?
when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
why is 90% of all fossils found in sedimentary rocks?
Fossilization can only occur in an environment without air, otherwise the organic material will simply erode.
How old is the Metamorphic rock?
3.8 billion years old
How many rock types are there?
3 different types
What is the fourth step in the rock cycle?
Erosion
What is one thing in a rock?
Minerals
How do you know there's a fossil in the rock?
You will see the imprint
How old is the first rock?
4.36 billion years old
What are the different types of rocks?
Sedimentary, Igneous, and Metamorphic.
What is the fifth step in the rock cycle?
Metamorphism
How much oxygen is in a rock?
92%
What do you do if you find a fossil in a rock?
leave it exactly where you found it.
When was the first rock discovered?
4.4 Ga