We analyzed the sedimentological characteristics and magnetic properties of cores from the three basins of Clear Lake, California, USA, to assess the depositional response to a series of land use changes that occurred in the watershed over the 20th century. Results indicate that distinct and abrupt shifts in particle size, magnetic concentration/mineralogy, and redox conditions occur concurrent...

Abstract The number of abandoned mines is continuously increasing in the world. sustainable exploitation these a top priority globally. Pit lakes created mining sites provide benefits and present risks for region. This paper presents methodology to assess natural hazards related pit lakes. proposed framework based on well-established internationally accepted risk management standards allows ass...

Abstract Pit lakes are common features of open pit mining and can present significant risks, yet also provide beneficial end use opportunities. Many processes that influence the magnitude these risks opportunities remains poorly understood, which presents a challenge to lake closure management. In this two-part manuscript, four subject matter experts from Germany, Canada, Australia, USA recomme...

Almost all post exploitation open pit mines in the world are shaped as a final reservoir intended to be filled with water. In Europe, creation of water lakes is most common way reclaiming mines. The safety and security mine one priorities regions. One main hazards identified slope stability lake banks. To develop reliability methodology for assessing long-term flooded mines, large-scale numeric...

Late Miocene "Lake Pannon" (~11.3 Ma) was a remnant of the Central Paratethyan Sea. Successive freshening and constantly changing environmental conditions, like oxygenation, nutrition and substrate led to a well-documented radiation in molluscs and ostracods. Among ostracods (small crustaceans), Cyprideis is one of the most common genera in "Lake Pannon", as well as in several other ancient lak...

• Crypt Cave yielded a cache of historically extinct Rocky Mountain locusts. Food was collected and stored by Paleoindians during terminal Pleistocene. Direct 14 C date for Pleistocene settlement in Lake Lahontan basin. The remains approximately 1000 (MNI) locusts ( Melanoplus spretus ) from an archaeological pit Cave, Winnemucca (dry) Lake, Nevada, to between 14,305–14,067 calendar years befor...

Pit lakes in the Lausitz lignite mining district of Germany are diverse in size and morphometry. Many are extremely acidic with pH ≤ 3 and high in iron concentrations. Productivity in most of the mining lakes is generally low and they support only simple food webs; a few of the acidic lakes, with high nutrient concentrations, are highly productive. State planners hope to develop the lake region...

Pleistocene to present evaporitic lacustrine sediments in Lake Magadi, East African Rift Valley, Kenya were studied and mapped using spectral remote sensing methods. This approach incorporated surface mineral mapping using space-borne hyperspectral Hyperion imagery together with laboratory analysis, including visible, near-infrared diffuse reflectance spectroscopy (VNIR) measurements and X-ray ...

A gravel pit in south central Stearns County, Minnesota exposes sand and gravel of the Merden Lake esker which is thought to have been deposited by a subglacial stream associated with the Wisconsinan-aged Superior Lobe of the Laurentide ice sheet. An analysis of these sediments was conducted from samples collected through a vertical trench on an east-facing exposure of the gravel pit. A total o...