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Grand Canyon N.P.

Grand Canyon N.P. Geology of National Parks Map of Grand Canyon N.P. Locality Map Sediment in River Frost Wedging Spalling, Yosemite N.P. Cliff and Slope Formers Bright Angel Fault Garden Creek, flows along the fault until it joins the Colorado River as a barbed tributary Garden Creek

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Grand Canyon N.P.

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  1. Grand Canyon N.P. Geology of National Parks

  2. Map of Grand Canyon N.P.

  3. Locality Map

  4. Sediment in River

  5. Frost Wedging

  6. Spalling, Yosemite N.P.

  7. Cliff and Slope Formers

  8. Bright Angel Fault Garden Creek, flows along the fault until it joins the Colorado River as a barbed tributary

  9. Garden Creek • Garden Creek flowing into the Colorado River

  10. Garden Creek Waterfall • Example of a hanging valley

  11. Inner Gorge • View of the Inner Gorge from desert View Drive on the South Rim

  12. Inner Gorge • Another view from Desert Rim Drive

  13. Warnings • Hiking in the canyon can be dangerous • Every year, about a dozen people die

  14. River Level View • Imagine trying to climb down to the river to get a drink

  15. Pillow Basalt • This photo is from the Columbia River Flood Basalt Province

  16. Vishnu Schist Close-up

  17. Zoroaster Granite • Zoroaster granite is the reddish rock; in right photo, the Zoroaster is in contact with the Vishnu Schist

  18. Contact Metamorphism • Proximity to a heat source may cause new minerals to form • Zone of contact metamorphism is known as contact aureole

  19. Igneous Sill • Intrusion is parallel to existing layers • Granite sills intruded into calcareous schist of the Hebron Formation in southeastern Connecticut

  20. Igneous Dike • Photo shows thin, pink aplite dikes cutting the black basaltic dikes and the gray granite at Pender Harbor, Southwest British Columbia

  21. Conglomerate • Rock fragments in this conglomerate are older than the conglomerate itself

  22. Hort and Graben Structures • Faults are normal faults

  23. Fault Scarp Diagram

  24. Blind Fault and Monoclinal Fold • Monoclinal folds are often the result of movement on a hidden fault

  25. Point Sublime • Point Sublime is a monadnock between Crystal and Shinumo Creeks

  26. Tonto Platform

  27. Transgression • A = sandstone • B = shale • C = limestone

  28. Disconformity • Parallel layers of sedimentary rocks • Fossils in the rock layers reveal that, although parallel, the sequence is not continuous

  29. Redwall Limestone

  30. Coconino Sandstone and Hermit Shale • Upper cliff is Coconino sandstone • Lower slope is Hermit Shale

  31. Cross-bedding • Cross-bedding in the Coconino sandstone

  32. Lava Falls Video • Rafting over the rapids at Lava Falls

  33. Vulcan’s Forge

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