Plate Tectonics and the Rock Layers of Grand ... - Gsenmschool.org
Plate Tectonics and the Rock Layers of Grand ... - Gsenmschool.org
Plate Tectonics and the Rock Layers of Grand ... - Gsenmschool.org
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Gr<strong>and</strong> Staircase-Escalante National Monument Geology Unit 2<br />
Student Activity<br />
X. Tropic Shale – Kt<br />
Straight Cliffs<br />
Tropic Shale<br />
Time formed<br />
<strong>Rock</strong><br />
Appearance:<br />
Special features<br />
Environment when<br />
formed<br />
Similar modern day<br />
habitats<br />
~ 93 mya, Mesozoic/ Late Cretaceous<br />
Shale, clay<br />
Dark gray, blue gray; 500-700 feet; a slope-former with slumps <strong>and</strong><br />
l<strong>and</strong>slides.<br />
Very few plants grow in its soil; badl<strong>and</strong>s have a “surface-<strong>of</strong>-<strong>the</strong>moon”<br />
feel; slippery when wet; many fossils including ammonites,<br />
mollusks, sharks, pliosaurs, turtles, <strong>and</strong> more.<br />
Part <strong>of</strong> <strong>the</strong> Western Interior Seaway. Floor <strong>of</strong> a shallow sea, not<br />
right against <strong>the</strong> shoreline.<br />
Gulf <strong>of</strong> Mexico, away from <strong>the</strong> coast.<br />
11
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