In What Environment Did The Zoroaster Granite Form

During an orogeny a mountain building episode 1 7 billion years ago those rocks were folded faulted and uplifted metamorphosed and intruded by the zoroaster formation predominantly granite also subsequently metamorphosed to form granite gneiss. Circle which rock family ies these rocks belong to. Zoroaster granite intruded into the vishnu schist at the base of the grand canyon.

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In what environment did the zoroaster granite form.

Thinking of the geologic record as a book is helpful to understand each page of earth s history. It is in the form of igneous intrusions called plutons and contains iron and magnesium rich materials. Click the bottom layer of the diagram to see the steps that resulted in the formation of the rocks. The grand canyon tells one of the world s greatest geologic stories.

Use the movie controls to examine each frame and read the caption text. The beginning of the story starts at the bottom of the. Most were deposited in warm shallow seas and near ancient long gone sea shores in western north america. How did the layers of the grand canyon form.

Its distinctive features allow researchers to piece together the history of this unique location one of america s treasures and a unesco world heritage site. The projected age is 1700 1850 myr. No fossils have been found in this basement rock. Sedimentary igneous metamorphic bright angel shale if you came to grand canyon area 515 million years ago when the.

It is placed in the early proterozoic era. The geology of the grand canyon area includes one of the most complete and studied sequences of rock on earth. Because of the extreme heat and pressure that folded and changed the rock any fossils in the original rock were destroyed. The resulting mountain range is believed to have been 5 6 miles high.

Es2906 vishnu schist and zoroaster granite. The nearly 40 major sedimentary rock layers exposed in the grand canyon and in the grand canyon national park area range in age from about 200 million to nearly 2 billion years old.