Blaine didn't know what the three types of rock were before our geology leg. This is what his geology test would have looked like before our summer-long, zip-lining journey began:
But thanks to some amazing new tech from our Uncle and his prairie dog lab assistant, we now know the three types of rocks. And pretty soon you'll get to join us on that leg!!
But before that happens, Blaine and I thought we would share a few basics of geology - just so you will know how to correctly answer that question above!
Let's dig in . . .
Rocks can be broken into three main categories. These three types of rock are based on how the rock was formed.
Here are the different types:
Sedimentary rock is made from various layers of crushed minerals and the decayed remains of plants or animals. The layers can easily be seen in a band of this type of rock.
Sedimentary rock tends to be very weak thanks to the way it was formed. Limestone, sandstone, and coal are all examples of this type of rock.
Metamorphic rock has been changed by a lot of heat or pressure. The layers of this type of rock can be difficult to distinguish, depending upon the type of rock that it was formed from.
Metamorphic rock is very strong! Marble, granite, and gneiss are all examples of this type of rock.
Igneous rock is formed by fire - think volcanoes! This type of rock begins as molten rock, or magma, from the Earth’s core and cools to form igneous rock. The shape and form of the rock are determined by how quickly it cools.
The strength of igneous rock depends upon what type it is - some igneous rock can even float! Basalt, pumice, and obsidian are all examples of this type of rock.
Whew, glad we were able to clear that one up!
If you need a few ideas of some hands-on activities to do as you share about the three types of rock, check out these activities:
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