Quartzite is a nonfoliated metamorphic rock that consists mostly of quartz.It's usually a white to pale gray rock, but occurs in other colors, including red and pink (from iron oxide), yellow, blue, green, and orange. Located in southwest Bolivia, Salar de Uyuni is the largest salt flat in the world. Potassium-argon dating established the age of the oldest rocks between 1.91 and 2.44 million years (Late Pliocene) and it is composed primarily of basalt, which is formed by cooling lava.. It is the only emergent island of the Cocos Plate, one of the minor tectonic plates. The geology of Bolivia is somewhat of a microcosm of South American geology as a whole: the Andes to the west, a stable Precambrian craton to the east and sedimentary deposits in between. The Floridian peninsula is a porous plateau of karst limestone sitting atop bedrock known as the Florida Platform.The emergent portion of the platform was created during the Eocene to Oligocene as the Gulf Trough filled with silts, clays, and sands. Need a little extra Spanish I help? CliffsNotes offers extensive homework help and test prep to help you get an A on your next foreign language exam! Flora and fauna began appearing during the Miocene.No land animals were present in Florida prior to the Miocene. Cocos Island is an oceanic island of both volcanic and tectonic origin.
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