Acrocanthosaurus Inside and Out

Acrocanthosaurus Inside and Out PDF

Author: Kenneth Carpenter

Publisher: University of Oklahoma Press

Published: 2016-09-22

Total Pages: 152

ISBN-13: 0806156376

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How can paleontologists know what a living dinosaur was like more than a hundred million years ago, particularly when only partial skeletons remain? Focusing on one large carnivorous dinosaur, Acrocanthosaurus (“high-spined lizard”), paleontologist Kenneth Carpenter explains the process, pairing scholarly findings with more than 75 color illustrations to reconstruct “Acro” before readers’ eyes. In Acrocanthosaurus Inside and Out, he offers the most complete portrait possible of this fascinating dinosaur’s appearance, biology, and behavior. Acrocanthosaurus—similar in size to its later cousin Tyrannosaurus rex, but studded with large spines—roamed what is now the south-central United States 110 to 115 million years ago, during the Early Cretaceous. Carpenter worked on the most complete of the Acrocanthosaurus skeletons (nicknamed “Fran”) that has been found. Here he describes the techniques that tell us about Acro’s biological makeup, movements, and habits. Studies of joints reveal the range of possible motion, while bumps, ridges, and scars on the bones show where muscles, ligaments, and tendons attached. CT scans allow us to peer into the braincase, while microscopes afford a cross-sectional view of bones. These findings in turn offer an idea of how Acro stalked and ate its prey. Scientific evidence beyond the fossils provides avenues for further inquiry: What does the sedimentary rock encasing Fran’s bones tell us about Acro’s environment? What does our knowledge of Acro’s distant relatives, such as crocodilians and birds, imply about its heart and other soft tissues? Can our understanding of other animals explain Acro’s huge spines? Carpenter distills all this information into a clear, accessible, engaging account that will appeal to general readers and scholars alike. As the first book-length work on Acrocanthosaurus, this volume introduces a prehistoric giant that once stalked Texas and Oklahoma and offers a rare, firsthand glimpse into the trials and triumphs of paleontology.

Dinosaur Highway

Dinosaur Highway PDF

Author: Laurie E. Jasinski

Publisher: Texas A&M University Press

Published: 2008-10-01

Total Pages: 445

ISBN-13: 0875654738

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Where the Paluxy River now winds through the North Texas Hill Country, the great lizards of prehistory once roamed, leaving their impressive footprints deep in the limy sludge of what would become the earth’s Cretaceous layer. It wouldn’t be until a summer day in1909, however, when young George Adams went splashing along the creekbed, that chance and shifting sediments would reveal these stony traces of an ancient past. Young Adams’s first discovery of dinosaur tracks in the Paluxy River Valley, near the small community of Glen Rose, Texas, came more than one hundred million years after the reign of the dinosaurs. During this prehistoric era, herds of lumbering “sauropods” and tri-toed, carnivorous “theropods” made their way along what was then an ancient “dinosaur highway.” Today, their long-ago footsteps are immortalized in the limestone of the riverbed, arousing the curiosity of picnickers and paleontologists alike. Indeed, nearly a century after their first discovery, the “stony oddities” of Somervell County continue to draw Saturday-afternoon tourists, renowned scholars, and dinosaur enthusiasts from across the nation and around the globe. In her careful, and colorful, history of Dinosaur Valley State Park, Jasinski deftly interweaves millennia of geological time with local legend, old photographs, and quirky anecdotes of the people who have called the valley home. Beginning with the valley’s “first visitors”—the dinosaurs—Jasinski traces the area’s history through to the decades of the twentieth century, when new track sites continued to be discovered, and visitors and locals continued to leave their own material imprint upon the changing landscape. The book reaches its culmination in the account of the hard-won battle fought by Somervell residents and officials during the latter decades of the century to secure Dinosaur Valley’s preservation as a state park.

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