Red slate metamorphic rocks are a metamorphosed shale. Slate can vary in color and is easily broken into sheets for building materials.
Greater Avalonia—latest Ediacaran–Ordovician “peribaltic” terrane
Metamorphic Sedimentary Rock for Collections, Schools & Home
Identifying the Rocks of Lake Michigan (Geode, Septarian, Agate
Slate, Geology 1501
Storm Mountain Flagstone Southwest Boulder & Stone
180 Geology stuff ideas geology, rocks and minerals, rock identification
PDF) Descriptive Models for Epithermal Gold-Silver Deposits
180 Geology stuff ideas geology, rocks and minerals, rock identification
Raw Red Slate, Metamorphic Rock Specimen - Hand Sample - Approx. 3
6 Metamorphic Rocks – An Introduction to Geology
Amphibolite schist with cubic pyrite crystals, isle of Giga
shale, slate, phyllite, schist, gneiss, migmatite, granite