New PDF release: An Introduction to Fossils and Minerals: Seeking Clues to

By Jon Erickson

ISBN-10: 0816042365

ISBN-13: 9780816042364

ISBN-10: 143810961X

ISBN-13: 9781438109619

The learn of fossils, minerals, and gemstones has performed an important roles in expanding our wisdom in regards to the Earth, the adjustments the planet has undergone, and the species that experience inhabited it. This quantity introduces the interesting disciplines of geology, paleontology, and mineralogy, and the way they demonstrate secrets and techniques of the Earth's historical past. assurance contains: a scientific therapy of Earth background, rock kinds, marine fossils, terrestrial fossils, crystals, gemstones, and invaluable metals that offer insights into Earth's personality; the most up-tp-date information to be had on such subject matters as worldwide tectonics and faunal extinctions, together with a wealth of knowledge in regards to the death of dinosaurs; new applied sciences in detecting and retaining rocks and minerals; and the results of abrasion and weather adjustments.

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Extra resources for An Introduction to Fossils and Minerals: Seeking Clues to the Earth's Past (Living Earth)

Example text

These might develop novel adaptations that give them a survival advantage over other species. The adaptations might lead to exotic-looking species that prosper during normal background times, but because of their overspecialization are incapable of surviving mass extinctions. Therefore, the fossil record shows myriad strange creatures, the likes of which have never been seen since (Fig. 29). Figure 29 Helicoplacus, an experimental species with body parts assembled differently from those of every other living creature, became extinct about 510 million years ago after surviving for 20 million years.

Swamps, long since vanished, once harbored large populations of hippopotamuses and crocodiles, whose fossil bones now bake in the desert sands. After sampling a little geologic history, the next chapter shows how fossils helped uncover clues to the past. 23 2 CLUES TO THE PAST THE PRINCIPLES OF PALEONTOLOGY F ossils have been known from ancient times, and perhaps the first to speculate on their origin were the early Greeks. The Greek philosophers recognized that seashells found in the mountains were the remains of once-living creatures.

Starting out from Great Britain, he sailed to South America, Australia, Africa, and back to Great Britain. Pacific Ocean Atlantic Ocean GALAPAGOS ISLANDS 31 INTRODUCTION TO FOSSILS AND MINERALS Therefore, to Darwin, evolution worked at a constant tempo as species adapted to a constantly changing environment. Darwin coined the phrase “survival of the fittest,” meaning that members of a particular species that can best utilize their environment have the best chance of producing offspring that possess the survival characteristics of their parents.

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An Introduction to Fossils and Minerals: Seeking Clues to the Earth's Past (Living Earth) by Jon Erickson

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