ABSTRACT Mount Diablo State Park exemplifies many other conservation areas where managers balance the dual missions of protecting natural resources while providing public access. Roads and trails that crisscross the park are etched into the geomorphic surface, capturing and redirecting storm runoff, and presenting both a challenge for soil conservation and a consequence of construction and maintenance. We used field mapping, remote sensing, and modeling to assess erosion along the roads and trails in Mount Diablo State Park, which encompasses the headwaters of several urbanized watersheds. The field mapping in 2011 determined that 56% of the assessed roads and trails required either repair or reconstruction to control erosion and that ~67% of the culverts in the park required either repair or replacement. Aerial photography and modeling showed that other erosion (unrelated to roads or trails) preferentially occurred during wet periods, in specific lithologies, and on convergent slopes. Although lithology and climate drive slope-forming geomorphic processes, we found that the road and trail system (1) expanded the stream network with a capillary-like system of rills, (2) catalyzed prolonged erosion, and (3) altered the timing and pattern of sediment yield. In addition to water-driven erosion during wet periods, road and trail surfaces were subject to mechanical and wind erosion during dry periods. Spatially, dry erosion and runoff both conformed with and crossed topographic gradients by following the road and trail network. Road- and trail-induced erosion occurred across a wider range of rock properties and slope geometries than is typical for other erosion. Hence, the roads and trails have expanded the spatial and temporal boundary conditions over which geomorphic processes operate and, due to continual soil disturbance, have accelerated erosion rates. Although road density is a commonly used metric to rank road-related impacts at watershed scales, it misses both spatial variability and the opportunity to identify specific road and trail segments for remediation. We developed a spatially explicit scoring scheme based on actual erosion and the potential for sedimentation of discrete waterbodies. The data were incorporated into the park’s road and trail management plan in 2016.

Abstract Global population growth, urbanization, increasing standards of living in many developing countries, climate change and reformation of (renewable) energy supply are among the most important trends of the twenty-first century, accompanied by a continuous need for conflict mitigation and peacekeeping as well as civil society's right to political participation. Goals for global sustainable development relate directly to the role and key expertise of geological surveys. The Federal Institute for Geosciences and Natural Resources of Germany (BGR) supports these goals by adapting its agenda and scientific skills to global needs under the paradigm of ‘sustainability, responsibility and safety’. Our understanding of sustainability is the balance between economy, ecology and societal needs. Here, we report on the results of the recent adaption process within the BGR, giving a forecast for the upcoming decade. From now on, we will screen socio-economic developments continuously and adapt our work to the needs in politics, economy and society based on our knowledge and experience acquired over the last decades.

Abstract Birgitta Field was discovered by well 22/19-1 which encountered a 230 ft gas–condensate column in Triassic Skagerrak Formation and tested at a combined rate of 38.3 MMscfgd and 3750 bcpd. The tilted-fault block trap forms the crest of a Triassic ‘pod’ or mini-basin formed by salt withdrawal during Triassic extension, further rotated and eroded during Jurassic extension. Field extent is supported by apparent seismic hydrocarbon indications. An early oil charge was likely converted to condensate by Plio-Pleistocene gas influx and rapid burial, whilst an underlying palaeoresidual gas column reflects some trap leakage. Birgitta typifies certain Triassic reservoir characteristics in this part of the Central North Sea. The thick, relatively high net:gross reservoir comprises moderate to poorly sorted, sub-lithic to sub-arkosic sandstones deposited in a dryland braided fluvial system. Pore-lining chlorite overgrowths dominate the pore fabric, reducing pore throat sizes and contributing to appreciable levels of non-effective micro-porosity and hence elevated water saturation. Key petrophysical challenges are the accurate determination of effective porosity and water saturation. Birgitta approaches high pressure–high temperature conditions and illustrates some of the challenges of progressing small, unappraised field tie-backs. These include resource uncertainty, compartmentalization risk, infrastructure access and marginal economics. Evaluated for development several times, Birgitta presently remains undeveloped.

Abstract Berea sandstone, a potential Global Heritage Stone Resource, has been one of the most widely used sandstones in North America. This Paleozoic sandstone, quarried for more than 200 years in Ohio, has been used across much of the continent. Thousands of commercial, residential, ecclesiastical, government and other structures have been built with Berea sandstone, including Thomas Worthington's mansion in Chillicothe, Ohio, the Michigan Capitol in Lansing, Michigan, the Carnegie Library and Natural History Museum Building in Pittsburgh, Pennsylvania, and parts of the Parliament buildings in Canada. Grindstones made from Berea sandstone were shipped throughout North America, as well as to the Caribbean, South America, Europe and Asia. The stone is celebrated in a number of locations, notably Berea and Amherst, where quarries have been important historical sources of this stone. It has been known by a number of different geological and commercial names, including Berea grit and Amherst stone, complicating its identification from historical sources. Stone from the most productive quarries, however, was known to be homogeneous and can be identified by its quartz–arenite to sublithic–arenite composition, its fine to medium sand (125–350 µm) grain size and iron-cement spots. Berea sandstone continues to be quarried today in Erie and Lorain counties.

Abstract Soapstone occurs in Finland within Precambrian greenstone belts in the eastern parts of the country. Nunnanlahti and other deposits near Lake Pielinen are the best known and most important of these occurrences. This soft stone is highly workable. Soapstone was one of the most popular ornamental rocks used in architecture of the Jugend (Art Nouveau) style in St Petersburg, Russia, Helsinki, Finland, and in other northern European cities at the end of the nineteenth and into the early twentieth centuries.

Abstract Shoksha quartzite is a heritage stone of international importance. This stone, a hematitic quartzite composed predominantly of quartz with subordinate amounts of chalcedony and sericite, is Jatulian (2.3–2.0 Ga) in age. The sarcophagus of Napoleon I, Emperor of France, inside the Dôme des Invalides in Paris was cut from Shoksha quartzite quarried by Lake Onega, Russia. The details of the sarcophagus were cut and polished in Paris using steam machinery, an early use of this method. A monument to Russian Emperor, Nicholas I, in St Petersburg is also made in part of this quartzite. This stone also has been utilized in the Grave of the Unknown Soldier and the monument to Heroic Cities near the Kremlin in Moscow, as well as for other uses.

Abstract India has a great variety of natural stones that have been extensively used as dimension, ornamental and sculptural stone for numerous temples and monuments over many centuries. These temples and monuments, now heritage sites, have a major role in showcasing India's natural stone resources that occur in diverse geological formations of different geological systems across the Indian subcontinent. The formations contain a variety of stone, with colours and textures produced by varied geological processes thus providing a storehouse of diverse stone resources. This paper outlines four potential Global Heritage Stone Provinces where natural stones have been used in heritage monuments: the North and Northwestern Province, the Central and Western Peninsular Province, the Southern Peninsular Province and the Eastern and Northeastern Province. The geotechnical and aesthetic characteristics of the stones, and their response to weathering are discussed.

ABSTRACT Today, the United States Department of the Interior manages 500 million acres of surface land, about one-fifth of the land in the United States. Since enactment of the Antiquities Act in 1906, historic and scientific resources collected on public land have remained government property, held in trust for the people of the United States. As a result, the Department of the Interior manages nearly 204 million museum objects. Some of these objects are in federally managed repositories; others are in the repositories of partner institutions. The establishment of the United States as a nation corresponded with the development of paleontology as a science. For example, mastodon fossils discovered at or near present-day Big Bone Lick State Historic Site, Kentucky, found their way to notable scientists both in the United States and in Europe by the mid-eighteenth century and were instrumental in establishing the reality of extinction. Public land policies were often contentious, but generally they encouraged settlement and use, which resulted in the modern pattern of federal public lands. Continued investigation for fossils from public land filled the nation’s early museums, and those fossils became the centerpieces of many museum exhibitions. Case studies of the management of fossils found in Fossil Cycad National Monument, the John Day fossil beds, the Charles M. Russell National Wildlife Refuge and surrounding areas of public land, the American Falls Reservoir, and Grand Staircase–Escalante National Monument are outlined. These examples provide a sense of the scope of fossils on federal public land, highlight how their management can be a challenge, and show that public land is vital for continued scientific collection and research.