Catégories : Tous - hardness - color - composition - texture

par Katie KL Lycett Il y a 3 années

161

Tree organigram

Different types of rocks can be identified based on various characteristics such as grain size, color, hardness, presence of layers, and texture. Rocks like chert, rhyolite, and basalt exhibit fine grains, while diabase and conglomerate are characterized by larger grains or pebbles.

Tree organigram

Rock Identification

Fine grain

No Layers

Chert

Rhyolite

Darker

Small spotted grains

Diabase

Large spotted grains

Andesite

Hardness

Can be scratched by a penny

Slate

Can not be scratched by a penny

Basalt

Glassy

Obsidian

Not Glassy

Grey

Shale

Schist

Coarse grain

White/Grey
Opaque

Limestone

Translucent

Quartzite

Holes
Pumice
Layers
Spotted

Salt and pepper appearance

Gabbro

Pebbles

Conglomerate

Larger spotted grains

Pegmatite

Smaller spotted grains

Granite

Lighter

White

Black/grey layers

Marble

Dolostone

Brown

Visible darker layers

Gneiss

No visibly darker layers

Sandstone