Download PDF by Daniela Liggett, Bryan Storey, Yvonne Cook, Veronika Meduna: Exploring the Last Continent: An Introduction to Antarctica

By Daniela Liggett, Bryan Storey, Yvonne Cook, Veronika Meduna

ISBN-10: 3319189468

ISBN-13: 9783319189468

ISBN-10: 3319189476

ISBN-13: 9783319189475

This multi-disciplinary e-book will cater to scholars and people who are looking to have a extra severe glance behind the curtain of Antarctic technological know-how. This booklet will take a platforms method of supplying insights into Antarctic ecosystems and the geophysical atmosphere. extra, the booklet will hyperlink those insights to a dialogue of present matters, akin to weather swap, bio prospecting, environmental administration and Antarctic politics. it is going to be written and edited through skilled Antarctic researchers and scientists from a variety of disciplines. educational references could be integrated in the event you desire to delve deeper into the themes mentioned within the book.

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Extra resources for Exploring the Last Continent: An Introduction to Antarctica

Sample text

93 billion-year-old mineral, representing one of the oldest rocks found on Earth, to the present day. The composition and structure of rocks, and their relative age all indicate the geographic and tectonic environments that existed when they formed. 1). 2). 1: Sedimentary Rocks (Fig. 1) Sedimentary rocks are made from the eroded fragments of pre-existing rocks. The pieces are transported by wind and water and as they accumulate and build up in layers, they are buried and compressed, eventually turning into a solid rock.

Any moisture in the atmosphere breaks down rock, causing cracks, which are then enlarged by ice and sand to produce highly cavernous rocks known as tafoni. Wind-blown sand is instrumental in wearing down and polishing faceted stones known as ventifacts. The layers of sand and gravel deposited on the floor of the valleys are subject to permafrost, and the melting and freezing in the active layer produces unusual patterns known as sublimation polygons. All these features also appear to have analogues on Mars, and by understanding their formation and comparing them with Martian images, planetary scientists hope to increase their understanding of extraterrestrial processes.

10). Edward Wilson was the first person to study these coal seams, as he climbed the Beardmore Glacier on his way to the South Pole with Captain Scott in 1911. He noticed fossil leaves in the coal, which showed that Antarctica had not always been the barren, icy place he was experiencing. The most characteristic fossils were later identified as Glossopteris (Fig. 11), the largest and best-known genus of an extinct order of seed ferns. During Scott’s time, the idea that crustal fragments should move around on the surface of the globe was far from accepted, and the discovery of Glossopteris in East Antarctica as well as South America, Africa, Australia and India added weight to the concept of Gondwana and the theories of plate tectonics and continental drift.

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Exploring the Last Continent: An Introduction to Antarctica by Daniela Liggett, Bryan Storey, Yvonne Cook, Veronika Meduna

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