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Eisco Argillaceous Shale Specimen (Sedimentary Rock), Approx. 1" (3cm) - Pack of 12

  • 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
  • Average Specimen Size - 2-3 cm

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.

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