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Types of Rocks: Yellowstone National Park

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by

Alanna Buechele

on 14 May 2015

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Transcript of Types of Rocks: Yellowstone National Park

Columnar Basalt:
a common grey-black volcanic rock
forms during the cooling of lava

Columnar Basalt
Cretaceous Shale
a dark and fine sedimentary rock
formed by many layers of clay silt or mud
formed 144-65 million years ago during the Cretaceous period
Siliceous Sinter
also called geyserite
grayish-white rock found around geysers and hot springs
it grows very slowly
Rhyolite
light grey acidic volcanic rock
it is very similar to granite
Limestone
sedimentary rock formed by minerals calcite and aragonite.
In Yellowstone it is located under Mammoth Hot Springs
Types of Rocks: Yellowstone National Park
Tuff
formed by compact volcanic ash
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