Previous studies have shown the Escalante Valley, Utah, is subsiding due to groundwater withdrawal. The magnitude and spatial pattern of this cm/yr.-scale subsidence is mapped with satellite data from a synthetic aperture radar (SAR) using interferometric SAR (InSAR) processing techniques.

U.S. Arctic waters north of the Bering Strait and west of the Canadian border encompass a vast area that is usually ice covered for much of the year, but is increasingly experiencing longer periods and larger areas of open water due to climate change. Sparsely inhabited with a wide variety of ecosystems found nowhere else, this region is vulnerable to damage from human activities. As oil and gas, shipping, and tourism activities increase, the possibilities of an oil spill also increase. How can we best prepare to respond to such an event in this challenging environment? Responding to Oil Spills in the U.S. Arctic Marine Environment reviews the current state of the science regarding oil spill response and environmental assessment in the Arctic region north of the Bering Strait, with emphasis on the potential impacts in U.S. waters. This report describes the unique ecosystems and environment of the Arctic and makes recommendations to provide an effective response effort in these challenging conditions. According to Responding to Oil Spills in the U.S. Arctic Marine Environment, a full range of proven oil spill response technologies is needed in order to minimize the impacts on people and sensitive ecosystems. This report identifies key oil spill research priorities, critical data and monitoring needs, mitigation strategies, and important operational and logistical issues. The Arctic acts as an integrating, regulating, and mediating component of the physical, atmospheric and cryospheric systems that govern life on Earth. Not only does the Arctic serve as regulator of many of the Earth's large-scale systems and processes, but it is also an area where choices made have substantial impact on life and choices everywhere on planet Earth. This report's recommendations will assist environmentalists, industry, state and local policymakers, and anyone interested in the future of this special region to preserve and protect it from damaging oil spills.

This text explores the natural history of Texas and more than 2900 springs in 183 Texas counties. It also includes an in-depth discussion of the general characteristics of springs - their physical and prehistoric settings, their historical significance, and their associated flora and fauna.

Based on the 28th International Archaeometry Symposium jointly sponsored by the University of California, Los Angeles, and the Getty Conservation Institute, this volume offers a rare opportunity to survey under a single cover a wide range of investigations concerning pre-Columbian materials. Twenty chapters detail research in five principal areas: anthropology and materials science; ceramics; stone and obsidian; metals; and archaeological sites and dating. Contributions include Heather Lechtman's investigation of “The Materials Science of Material Culture,” Ron L. Bishop on the compositional analysis of pre-Columbian pottery from the Maya region, Ellen Howe on the use of silver and lead from the Mantaro Valley in Peru, and J. Michael Elam and others on source identification and hydration dating of obsidian artifacts.

“A unique, significant contribution to our maturing studies of the Clovis era.”—Gary Haynes, author of The Early Settlement of North America: The Clovis Era The Paleoindian Clovis culture is known for distinctive stone and bone tools often associated with mammoth and bison remains, dating back some 13,500 years. While the term Clovis is known to every archaeology student, few books have detailed the specifics of Clovis archaeology. This collection of essays investigates caches of Clovis tools, many of which have only recently come to light. These caches are time capsules that allow archaeologists to examine Clovis tools at earlier stages of manufacture than the broken and discarded artifacts typically recovered from other sites. The studies comprising this volume treat methodological and theoretical issues including the recognition of Clovis caches, Clovis lithic technology, mobility, and land use.

Since the mid-1970s, government agencies, scholars, tribes, and private industries have attempted to navigate potential conflicts involving energy development, Chacoan archaeological study, and preservation across the San Juan Basin. The Greater Chaco Landscape examines both the imminent threat posed by energy extraction and new ways of understanding Chaco Canyon⁠ and Chaco-era great houses and associated communities from southeast Utah to west-central New Mexico in the context of landscape archaeology. Contributors analyze many different dimensions of the Chacoan landscape and present the most effective, innovative, and respectful means of studying them, focusing on the significance of thousand-year-old farming practices; connections between early great houses outside the canyon and the rise of power inside it; changes to Chaco’s roads over time as observed in aerial imagery; rock art throughout the greater Chaco area; respectful methods of examining shrines, crescents, herraduras, stone circles, cairns, and other landscape features in collaboration with Indigenous colleagues; sensory experiences of ancient Chacoans via study of the sightlines and soundscapes of several outlier communities; and current legal, technical, and administrative challenges and options concerning preservation of the landscape. An unusually innovative and timely volume that will be available both in print and online, with the online edition incorporating video chapters presented by Acoma, Diné, Zuni, and Hopi cultural experts filmed on location in Chaco Canyon, The Greater Chaco Landscape is a creative collaboration with Native voices that will be a case study for archaeologists and others working on heritage management issues across the globe. It will be of interest to archaeologists specializing in Chaco and the Southwest, interested in remote sensing and geophysical landscape-level investigations, and working on landscape preservation and phenomenological investigations such as viewscapes and soundscapes. Contributors: R. Kyle Bocinsky, G. B. Cornucopia, Timothy de Smet, Sean Field, Richard A. Friedman, Dennis Gilpin, Presley Haskie, Tristan Joe, Stephen H. Lekson, Thomas Lincoln, Michael P. Marshall, Terrance Outah, Georgiana Pongyesva, Curtis Quam, Paul F. Reed, Octavius Seowtewa, Anna Sofaer, Julian Thomas, William B. Tsosie Jr., Phillip Tuwaletstiwa, Ernest M. Vallo Jr., Carla R. Van West, Ronald Wadsworth, Robert S. Weiner, Thomas C. Windes, Denise Yazzie, Eurick Yazzie