Way down deep, near the core of the earth
Is red molten rock called magma.
It consists of mostly silica, a little water and gases too.
It’s the basis of:

Igneous
Sedimentary
Metamorphic Rock
Three major groups of rocks.

Magma that has cooled, we call it igneous rock.
Mineral grains that interlock make up this crystalline block.
It’s either intrusive or extrusive, formed below or above the ground.
It’s the basis of:

Igneous
Sedimentary
Metamorphic Rock
Three major groups of rocks.

There’s diorite, andesite, rhyolite, granite, gabbro, and basalt,
Sandstone, siltstone, mudstone, shale, limestone and chert.
There’s quartzite, phyllite, marble, slate, gneiss and anthracite…
Just a few of the rocks that you might find.

When rock starts to weather and begins to erode away.
Particles settle out, sometimes as sand, silt and clay.
Layers lithify together, forming sedimentary rock.
Layer upon layer of rock.

Igneous
Sedimentary
Metamorphic Rock
Three major groups of rocks.

The metamorphic kind, is from pre-existing rock.
When under pressure and heat, becomes a brand new rock.
Deep underground the textures change and the minerals realign.
That’s metamorphic rock.

Igneous
Sedimentary
Metamorphic Rock
Three major groups of rocks.