By: Dakota, Corey, Isaac

Smooth, Gray, sharp edges, brownish, Kind of bumpy, White lines

This rock is formed by volcanoes erupting causing the magma to rise above earths surfes the magma cool’s and becomes igneous rock’s.

Scoria is a type of igneous rock

Igneous rock can harden under the ground or when it’s shooting out.

The fire formed rock’s formed from magma or lava.

Genies is a type of igneous

How this How this rock is rock is formedformed

They They were were formed formed into into metamorpmetamorphic rocks hic rocks will will change change tons of tons of pressure pressure & fosters & fosters build up build up and and change.change.

What are some What are some of the of the characteristics characteristics of this rock of this rock type? type?

Regularly, Regularly, angled angled crystals, shiny crystals, shiny & hard.& hard.

Common Common rocks of rocks of this type: this type:

gypsum, gypsum, obsidian, obsidian, limestone, limestone, pumice& pumice& granite granite sandstone.sandstone.

Gneiss rock Gneiss rock From: Rock From: Rock hounds.hounds.

Obsidian rock Obsidian rock from: Rock from: Rock hound.hound.

How this rock is formedHow this rock is formed

These little bits of our earth are These little bits of our earth are washed downstream where they washed downstream where they settle at the bottom of the rivers, settle at the bottom of the rivers, lakes, & oceans. Layer after lakes, & oceans. Layer after layer of eroded earth is layer of eroded earth is deposited on top of these layers deposited on top of these layers are pressed down more & more are pressed down more & more through untill the bottom layer through untill the bottom layer turns into rock.turns into rock.

Characteristics of the rockCharacteristics of the rock

Light colored & light weight, & the Light colored & light weight, & the presence of fossilspresence of fossils..

Common rocks of this typeCommon rocks of this type

Conglomerate, Gneiss, Granite, Conglomerate, Gneiss, Granite, Gypsum, Limestone, Obsidian, Gypsum, Limestone, Obsidian, Pumice, Sandstone, Schist, Scoria, Pumice, Sandstone, Schist, Scoria, ShaleShale

Pumice from Rock Hounds

Sandstone from Rock Hounds

Schist from Rock Hounds

Shale from Rock Hounds

Obsidian from rock Hounds

Our conclusion is that it is a Sedimentary rock because it is light colored & light weight.