Twelve argillaceous shale samples approximately 1" (3cm) in size
Small clast size indicates deposition in a low-energy environment such as a shallow lake or slow-moving river
Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements
Ideal for students in identification exercises due to shale's diagnostic flat, fissile rock structure
Specimen comes in clear labeled and barcoded bag for ideal storage
Description
Shale is formed from the cementation and lithification of very small grains of rock, commonly mud or clay. The small clast size indicates that though the grains had been heavily eroded, the rock formed in a low energy environment. Shale is useful in sedimentary rock identification exercises due to its recgonizable fissile habit.