21. From one bench it is possible to see the consequences in the face of a crystalline rock . 22. It passes through the Dodoma Belt, a geological area of Archaean and Proterozoic age Precambrian crystalline rocks . 23. Some crystals have formed by magmatic and metamorphic processes, giving origin to large masses of crystalline rock . 24. This zone consists of almost 10 km thick succession of the crystalline rocks , commonly called the Himal Group. 25. It developed from fragments of Laurasia, whose rocks were mainly Precambrian crystalline rocks , gneisses, and schists, and Gondwana. 26. Stanwell-Fletcher Lake is joined to the bay by the Union River; crystalline rocks are notable along the way. 27. The meteorite is a nearly completely crystalline rock , with a composition typical of volcanic lava crystallized from molten silicate. 28. It has undergone very little metamorphism except at its base where it is close to the Higher Himalayan crystalline rocks . 29. Interim storage for 30 years is expected, with eventual disposal in a deep geological repository in crystalline rock near Kalpakkam. 30. It is on this crystalline rock surface that the younger, more familiar layered rocks of the Colorado Plateau were deposited.