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| Granitic rock outcrops along Park Avenue located 3 miles east of the West Entrance Station. Rocks of many ages and compositions crop out in Joshua Tree National Park. Many of the popular areas are in outcrop areas of intrusive igneous rocks that range in composition and texture. The term "granitic rocks" is used to include different forms of granite, granodiorite, monzonite, diorite, and tonalite (Best, 1982). However, for without detailed analysis the best catch-all word used by most texts is simply granite, or better, granitic, to describe the coarse, granular fabric consisting of a mix of feldspar, quartz, mica, hornblende, and other minerals that crystallized from the cooling of magma deep in the subsurface. |
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