搜索结果: 46-60 共查到“知识库 自然地理学”相关记录789条 . 查询时间(1.317 秒)
Documenting the History of Oxygen Depletion in Lake St. Croix, Minnesota, Using Chironomidae Remains in the Sedimentary Record
Lake St. Croix midge Chironomidae volume weighted hypolimnetic oxygen transfer function eutrophication
2014/11/4
Lake St. Croix is a natural impoundment located at the southern end of the St. Croix River. Land use changes since European settlement (c. 1850) have resulted in nutrient runoff, eutrophication, and p...
The Effects of Sea Level Change on the Molecular and Isotopic Composition of Sediments in the Cretaceous Western Interior Seaway: Oceanic Anoxic Event 3, Mesa Verde, CO, USA
Sea Level Change on the Molecular Isotopic Composition of Sediments Cretaceous Western Interior Seaway Oceanic Anoxic Event 3 Mesa Verde CO, USA
2014/11/4
Cretaceous Oceanic Anoxic Events (OAEs) represent periods of enhanced burial of organic matter in black shale in marine, continental margin, and epicontinental settings around the globe. Compared to o...
Assessment of 21st Century Climate Change Projections in Tropical South America and the Tropical Andes
Climate change Andes Cordillera South America climate models future projections
2014/11/4
The tropical Andes are one of the regions where climate change has been most evident. This is consistent with the notion that tropical high-elevation mountains will be more affected by warming. One of...
Petrology and Provenance of the Triassic Sugarloaf Arkose, Deerfield Basin, Massachusetts
sedimentology sedimentary petrology. Deerfield basin Sugarloaf arkose Triassic Newark supergroup
2014/11/4
The ~2 km-thick Late Triassic Sugarloaf Arkose is the basal unit of the half-graben Deerfield basin, Massachusetts. Valley-river, piedmont-river, and alluvial-fan depositional facies within the arkose...
PALEOBIOLOGY OF THE CLIMACTICHNITES TRACKMAKER: AN ENIGMATIC LATE CAMBRIAN ANIMAL KNOWN ONLY FROM TRACE FOSSILS
Climactichnites Musculopodus trace fossils trackway paleobiology
2014/11/4
Based on a thorough examination of museum and field Climactichnites specimens, two species of this trace, which is restricted to North America, are recognized, each representing a unique behavioral va...
PALEOBIOLOGY OF THE CLIMACTICHNITES TRAKMAKER: AN ENIGMATIC LATE CAMBRIAN ANIMAL KNOWN ONLY FROM TRAE FOSSILS
PALEOBIOLOGY CLIMACTICHNITES TRACKMAKER LATE CAMBRIAN ANIMAL TRAE FOSSILS
2014/10/20
Based on a thorough examination of museum and field Climactichnites specimens, two species of this trace, which is restricted to North America, are recognized, each representing a unique behavioral va...
Th Effcts of Sea Level Change on the Molecular and Isotopic Composition of Sediments in the Cretaceous Western Interior Seaway: Oceanic Anoxic Event 3, Mesa Verde, CO, USA
Isotopic Composition Sediments the Cretaceous Western Interior Seaway Oceanic Anoxic Event 3 Mesa Verde CO USA
2014/10/20
Cretaceous Oceanic Anoxic Events (OAEs) represent periods of enhanced burial of organic matter in black shale in marine, continental margin, and epicontinental settings around the globe. Compared to o...
Petrology and Provenance of the Triassic Sugarloaf Arkose, Deerfild Basin, Massachusett
Petrology Provenance Triassic Sugarloaf Arkose Deerfield Basin Massachusett
2014/10/20
The ~2 km-thick Late Triassic Sugarloaf Arkose is the basal unit of the halfgraben Deerfield basin, Massachusetts. Valley-river, piedmont-river, and alluvial-fan depositional facies within the arkose ...
Salt Lake City’s Urban Growth and Kennecot Utah Copper: A Geographical Analysis of Urban Expansion onto a Previously Proposed Superfund Site Adjacent to the World’s Largest Copper Mine
Salt Lake City’s Urban Growth Kennecott Utah Copper Urban Expansion Adjacent to the World’s Largest Copper Mine
2014/10/20
Kennecott copper mine is one of the largest producers of pollution in the United States: it has contaminated over 72 square miles in the Salt Lake Valley. In 1998 alone, Kennecott, which is located on...
Shale-Derived Dissolved Organic Mattr as a Substrate for Subsurface Methanogenic Communities in the Antrim Shale, Michigan Basin, USA
Shale-Derived Dissolved Organic Matter Subsurface Methanogenic Communities the Antrim Shale Michigan Basin USA
2014/10/20
The microbial origin of methane produced from sedimentary basins is a subject of great interest, with implications for the global cycling of carbon as well as natural gas exploration. Despite the grow...
Documenting the History of Oxygen Depletion in Lake St. Croix, Minnesota, Using Chironomidae Remains in the Sedimentary Record
Oxygen Depletion in Lake St. Croix Minnesota Chironomidae Remains the Sedimentary Record
2014/10/20
Lake St. Croix is a natural impoundment located at the southern end of the St. Croix River. Land use changes since European settlement (c. 1850) have resulted in nutrient runoff, eutrophication, and p...
Growth of chromidia-forming vahlkampfid amoebae from Laguna Figueroa, Baja California del Norte, Mexico and Eel Pond, Woods Hole, Massachusett, U.S. A. under limited oxygen gas conditions
chromia-forming vahlkampfia amoebae Laguna Figueroa Baja California del Norte Mexico and Eel Pond Woods Hole Massachusett U.S. A. limited oxygen gas conditions
2014/10/20
Paratetramitus jugosus, a vahlkampfiid amoebomastigote, was isolated into monoprotist/monobacterial (Bacillus sp.), cultures from laminated microbial mats (Laguna Figueroa, Baja California Norte, Mexi...
Assessment of 21st Century Climate Change Projections in Tropical South America and the Tropical Andes
21st Century Climate Change Projections Tropical South America the Tropical Andes
2014/10/20
The tropical Andes are one of the regions where climate change has been most evident. This is consistent with the notion that tropical high-elevation mountains will be more affected by warming. One of...
Investigation on the Automatic Geo-Referencing of Archaeological UAV Photographs by Correlation with Pre-Existing Ortho-Photos
Geo-referencing unmanned aerial vehicle archaeology automation correlation image matching
2014/7/30
We present a method for the automatic geo-referencing of archaeological photographs captured aboard unmanned aerial vehicles (UAVs), termed UPs. We do so by help of pre-existing ortho-photo maps (OPMs...