11. Kettle holes can also occur in ridge shaped deposits of loose rock fragments called till. 12. "' Gravel "'is composed of unconsolidated rock fragments that have a general granule-to boulder-sized fragments. 13. He had been picking up rock fragments that had apparently been chipped by human ancestors. 14. Boggs divides them into four categories; major minerals, accessory minerals, rock fragments , and chemical sediments. 15. Pyroclastic flows are the result of explosive eruptions of molten or solid rock fragments , or both. 16. The valley soils generally contain loam, small rock fragments , sand and sandy clay, and are varied. 17. Granites and other phaneritic igneous rock fragments are plotted in the F pole of the diagram. 18. The carving produced 370 truck-loads of rock fragments . 19. At the foot of the slope were rock fragments , probably the broken lintels of the gatehouse. 20. That density of mud and the flow rate brings the rock fragments up to the surface.
