ABSTRACT Benjamin Waterhouse Hawkins (1807–1894) was a British scientific illustrator and sculptor who illustrated many British exploration reports in the 1830s and 1840s. In the early 1850s, Hawkins was commissioned to create life-size, concrete sculptures of Iguanodon , ichthyosaurs, and other extinct animals for a permanent exhibition in south London. They were the first large sculptures of extinct vertebrates ever made, and they are still on view today. Inspired by his success in England, Hawkins launched a lecture tour and working trip to North America in 1868. Soon after his arrival, he was commissioned to “undertake the resuscitation of a group of animals of the former periods of the American continent” for public display in New York City. Had it been built, this would have been the first paleontological museum in the world. As part of this ambitious project, with the assistance of the American paleontologist Joseph Leidy, Hawkins cast the bones of a recently discovered Hadrosaurus specimen and used them to construct the first articulated dinosaur skeleton ever put on display in a museum. It was unveiled at the Academy of Natural Sciences of Philadelphia in November 1868. Hawkins worked tirelessly on New York’s proposed “Paleozoic Museum” for two years, until his funding was cut by William “Boss” Tweed, the corrupt leader of the Tammany Hall political machine, who grew hostile to the project and abolished the Central Park Commission that had made it possible. When Hawkins defiantly continued to work, without funding, Tweed dispatched a gang of thugs to break into his studio and smash all of the sculptures and molds. Although Hawkins would create several copies of his articulated Hadrosaurus skeleton for other institutions, the prospect of building a grand museum of paleontology in America was forever destroyed by Tweed’s actions.

The 2021 GSA Northeastern, Southeastern, joint North-Central/South-Central, and Cordilleran Section Meet-ings were held virtually in spring 2021 during continued restrictions on travel and large gatherings due to COVID-19. Eleven groups put together field guides, taking participants on treks to states from Connecticut to Nevada in the United States, to Mexico, and to Italy, and covering topics as varied as bedrock geologic map-ping, geochemistry, paleodrainage, barrier islands, karst, spring systems, a southern Appalachian transect, Ordo-vician and Mississippian stratigraphy, high-energy events, Cretaceous arc granites and dextral shear zones, and Mesoproterozoic igneous rocks. This volume serves as a valuable resource for those wishing to discover, learn more about, and travel through these geologically fascinating areas.

Abstract Most cities in the United States are within one or two physiographic units, and only a few major rock and soil types must be dealt with in civil works in different parts of a city. New York City's five counties, however, cover three physiographic units (the Coastal Plain, New England Upland, and Triassic Lowland), which contain nine different foundation rock types and dozens of soils. The foundation types range from high-strength gneissoid granite through soluble marble to soft-sensitive, low shear strength, and high moisture content, organic silty clay having very limited bearing capacity. Each rock and soil type has its own engineering characteristics, and, in addition, local problems exist within each major type. Serious problems of foundation support in loosely consolidated materials of the Coastal Plain are solved by use of spread footings, whereas a similar structure in the New England Upland may require the use of caissons where bedrock underlies thick till. The New York City crystalline rocks are separated into the New York City Group and the Hutchinson River Group by extension of Cameron’s Line, a regional north-northeast-trending thrust fault. The formations of these groups are cut by several sets of fault systems, and seismic activity has been noted along the northeast-striking fault system. Slope stability can be a problem in valleys at the north end of the city or in deep cuts within the moraine areas. The use of reinforced concrete walls and line drilling have helped, where rights-of-way are tight, to control slopes. Ground water, once used in the city for water supply, is now an engineering problem. As population expanded, salt-water encroachment due to drawdown by pumping and contamination from human activity made the ground water unfit for human consumption. The impotability of the ground water fostered the construction of reservoirs and hundreds of kilometers of rock tunnels and distribution mains, which make up one of the greatest water supply systems in the world. A negative result of the cessation of groundwater use has been the rise in the water table, which has flooded structures, such as subway tunnels, that were built when groundwater pumping had greatly lowered the water level. Sewer tunnels and treatment plants have been built to reduce the pollution problems in the waters surrounding the city. Erosion is a serious problem on New York City’s ocean beaches. Building up the beaches by placement of dredged material and the wiser planning of protective structures are important measures in attempting to preserve these recreational facili-ties from natural erosion. The complexity of the geology and the resulting foundation problems in the city have resulted in the writing of a comprehensive building code for New York City. This 1970 code requires a scientific approach to foundation exploration and generally allows the use of modern material and technology not allowed under the pre-World War II codes that were in use through the 1960’s. In addition to the vast number of engineering projects, such as tunnels and bridges for transportation and large buildings in which people live and work, hundreds of hectares of land have been added to the city’s perimeter through landfill projects that were started during the time of the English settlers and that continue to date. The latest perimeter landfill is the site of the future Battery Park City in Lower Manhattan in the Hudson River; the landfill consists largely of the spoil from excavation for the Twin Towers of the World Trade Center.