Ward's® Special Sand-Gravel Mix and Stress Clay

Specially prepared sediment mixes for use with stream tables.

• Created by Ward's geologists
• Compatible with ay type of stream table
• Teach students about stress, fractures, and faults with real earth materials.

Sand-gravel mix includes various sediments up to ¹/₈" diameter. Stress clay is perfect for showing the development of stress cracks. Both mixes come packaged in reusable pails.