11. These clasts must have been heated to to harden. 12. Lithic clasts including basement material are also present. 13. When found, these clasts represent the earliest phase of mare basalt volcanism preserved. 14. Some of the chert clasts actually contained fossils. 15. The tuff is littered by clasts from the Seelys and McDougall Brook Granite formations. 16. The sedimentary clasts include blocks of Ordovician quartzite that reach up to in length. 17. Clasts of smaller grained granite are also found in the large-grained granite.18. Colluvium contains clasts made of shale and sandstone. 19. Between the clasts , the rock can be composed of a sorting of the rock. 20. Clasts from beaches and streams tended to have reflectance values of less than 35 %.