Quick Write: Get the sandstone you made, and create two T-charts as shown. Compare the rocks and complete the T-charts. Include comparisons of grain size, grain shape, and packing density. 10/27 Making Shale Lesson #35 Today’s Plan:Reminder: -Compare rocks-For test retakes, turn corrections into me. -Sandstone formation -Making Shale -Shale formation and geology principles -Brainstorm end of the trimester projects Our sandstone Coconino Sandstone Our sandstone Hermit Shale

Period 1: Grand Canyon Model Question 5 Which came first the Grand Canyon, Colorado River, or Colorado Plateau? 10/27 Making Shale Lesson #35

Sandstone Formation  Deposition; loosely packed sand  Over a long period of time sand is compacted  Water containing matrix materials enters sand  Over a long period of time water evaporates and sand cements into sandstone. 10/27 Making Shale Lesson #35

Shale 10/27 Making Shale Lesson #35 The shale from the Grand Canyon is black and contains fossils of plants, but our shale is white. What conditions might make dark shale with leaf fossils?

Formation of Shale Clay and silt size particles are deposited in areas of slow moving water. Leaves and other remains of plants and animals may get buried in the mud. Over time, the pressure of overlying sediments may squeeze the water out of the mud and form shale. -types/shale.htm 10/27 Making Shale Lesson #35

Geological Principles 10/27 Making Shale Lesson #35 Layers of sediments are generally deposited in a horizontal or nearly horizontal position. Each new layer forms a new horizontal layer on top of the layers below. The Principle Of Original Horizontality

Geological Principles 10/27 Making Shale Lesson #35 The Principle of Uniformitarianism The present is the key to the past. Geologists use current observations, about processes happening today, to infer about events that happened in the past.

Earth History Test Retakes: –Study (download notes or use your journal) –Make corrections –Show me your corrections and set a retake time (in the next two weeks)

Active Reading Strategy Mars ObservationPrior Knowledge Water on Mars 10/27 Making Shale Lesson #35

Earth History project ideas… 10/27 Making Shale Lesson #35

Homework: ~Think about project ideas ~Study and make test corrections if you want a retake 10/27 Making Shale Lesson #35