Science Studies

Download Alfred Wegener. Uncovering Plate Tectonics by Greg Young PDF

By Greg Young

During this beautiful biography, little ones will examine the attention-grabbing existence, theories, and discoveries of Alfred Wegener. From his time in Greenland learning meteorology with sizzling balloons to his conception of Pangea, readers may be desirous to examine extra approximately Wegener's contributions to technological know-how and the strides he took in the direction of constructing the research of plate tectonics. The easy-to-read textual content, available thesaurus, necessary index, and interesting evidence paintings along with the full of life photographs and fascinating lab job to interact readers from commencing to end!

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For example, river-derived sediments might be transported to the ocean at point A. The sediments may first be transported five miles to the west, reaching point B and largely bypassing the continental shelf. The sediments may then be transported 50 miles north, by an ocean current, to the head of a submarine canyon at point C. The incision of the canyon may be heavily driven by river-derived sediments from point A. The delivery of sediments to a submarine canyon can occur in the context of several phenomena, including a hyperpycnal flow or a turbid underflow.

Researchers have noted the potential for confusion in this context, given that the term Columbia Basin is generally applied very loosely. At the western, most downstream, end of the gorge, the Columbia Backarc Basin ends and blends into the Portland Basin. The Portland Basin is a small basin that was produced by tectonic activity, largely consisting of extensional fault activity. The part of the Cascadia Backarc Zone that surrounds the Columbia River Gorge and overlaps with the Columbia Plateau will, for the sake of simplicity, be regarded as the Columbia Backarc Basin.

This cooling causes the ✧ 30 The Columbia River Gorge ✧ 31 This picture shows the Columbia River and the sloping walls, covered by trees, of Columbia River Gorge. ) air to dump its moisture as rain or snow in the vicinity of the mountains. For example, Portland is just east of the Cascades and receives fairly abundant precipitation. Portland is therefore part of the rainshadow of the Cascades. As the dried-out air moves down from the Cascades to the Columbia Plateau, the air warms and is able to further evaporate water from the Columbia Plateau.

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