Holly Crossland

Holly Crossland

Holly Crossland
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Madagascar is the world’s oldest island. The first island appears on Earth about 4.4 billion years ago when the ocean formed. The island that has existed longest is Madagascar which separated from India perhaps 85 to 90 million years ago, after the two had split off from Antarctica about 125 million years ago.

Madagascar is the world’s oldest island. The first island appears on Earth about 4.4 billion years ago when the ocean formed. The island that has existed longest is Madagascar which separated from India perhaps 85 to 90 million years ago, after the two had split off from Antarctica about 125 million years ago.

TILTED ROCK LAYERS:  The sedimentary layers in this large roadcut near Denver, CO. can be clearly recognized by the variation in color. This deformation is related to the uplift of the Rocky Mountains

TILTED ROCK LAYERS: The sedimentary layers in this large roadcut near Denver, CO. can be clearly recognized by the variation in color. This deformation is related to the uplift of the Rocky Mountains

Uinkaret volcanic field (NASA photo) on the No.Rim of the Grand Canyon (lava flows are brown). Lava flows from this volcanic field have dammed the Colorado River multiple times from 725,000 to 100,000 yrs ago. One of these cascades is today's 'Lava Falls.' Lava Falls Rapid, below Lava Falls on the Colorado River, is 'at all water levels, the most severe rapid in Grand Canyon.'

Uinkaret volcanic field (NASA photo) on the No.Rim of the Grand Canyon (lava flows are brown). Lava flows from this volcanic field have dammed the Colorado River multiple times from 725,000 to 100,000 yrs ago. One of these cascades is today's 'Lava Falls.' Lava Falls Rapid, below Lava Falls on the Colorado River, is 'at all water levels, the most severe rapid in Grand Canyon.'

Raplee Ridge, part of the Monument Upwarp in southeastern Utah, is a long, narrow, folded anticline that formed about 70 million to 50 million years ago.

Raplee Ridge, part of the Monument Upwarp in southeastern Utah, is a long, narrow, folded anticline that formed about 70 million to 50 million years ago.