our groups observations indicate that it has bumps holes, its brown, and it looks like an meteorite. That is our observations.

How is this rock formed

They are formed by volcanoes.

What are some of the characteristics of this rock type

large crystals and small crystals.

Common rocks of this type

May display two grain sizes one much larger than the other.

 

Obsidian rock

Scoria from Rock Hounds

Metamorphic rocks are formed by:

If a volcano erupts if it doesn't have enough

pressure for the magma to go up it hardens. And it forms into a metamorphic rock

They maybe be shiny and hard .Met’s rock usually contain crystals.

Commons type: Coal, Quartz, Marble, slate, Gneiss

Rock hounds

Schist

Rock hounds Gneiss

Rock hounds

How rocks are formed

Little pieces of earth get broken down and worn away. They are washed down stream and settle to the bottom of rivers, lakes, and oceans. Layer after layer the pieces of earth are deposited on top of each other overtime and form the rock.

Characteristics

It has a layered appearance, colored, and maybe even fossils.

Other types of sedimentary rocks:

Sandstone, Limestone, Shale, Conglomerate, Gypsum, Mudstone, Gneiss, Pumice, and Granite.

Limestone

From Rock Hounds

We have come to a conclusion that our rock is a metamorphic type because it makes a low taping sound and it has a crystal in it.