Results 81 to 90 of about 1,647,655 (410)

Notes on the geology of the Florida phosphate deposits [PDF]

American Journal of Science, 1891
n ...
openaire   +2 more sources

Exploiting Multitask Deep Learning to Identify Multiple Heavy Metal Contamination at Large Scales

Advanced Intelligent Systems, EarlyView.
A multitask deep learning framework evaluates manganese, chromium, and cobalt concentrations in European soils, achieving an average R2 of 0.75. From 2009 to 2015, soil concentrations increase significantly. Source analysis identifies anthropogenic manganese and geological chromium and cobalt origins.
Tao Hu, Qiusong Chen, Fiona H. M. Tang, Sybil Derrible, Liyuan Chai, Zhang Lin, Chongchong Qi   +6 more
wiley   +1 more source

Petroleum geology controlled by extensive detachment thinning of continental margin crust: A case study of Baiyun sag in the deep-water area of northern South China Sea

Petroleum Exploration and Development, 2018
The relationships between crustal stretching and thinning, basin structure and petroleum geology in Baiyun deep-water area were analyzed using large area 3D seismic, gravity, magnetic, ocean bottom seismic (OBS), deep-water exploration wells and ...
Xiong PANG, Jianye REN, Jinyun ZHENG, Jun LIU, Peng YU, Baojun LIU   +5 more
doaj   +1 more source

The origin and diversification of Amaryllidaceae: A phylogenetic and biogeographic analysis

American Journal of Botany, EarlyView.
Abstract Premise Previous angiosperm‐wide studies estimated that the geophytic family Amaryllidaceae diverged in Africa 87.00–46.77 million years ago (mya), spanning the Cretaceous and Palaeogene periods, including multiple important climatic and geological events.
Zoë H. Dennehy‐Carr, Kálmán Könyves, Chris Yesson, John C. David, Alastair Culham   +4 more
wiley   +1 more source

Color polymorphism in Anemone coronaria: Correlations with soil, climate, and flowering phenology

American Journal of Botany, EarlyView.
Abstract Premise Flower color polymorphism (FCP) is thought to be driven by multiple selection agents. Although widely associated with visual attraction of multiple pollinators, FCP is also often correlated with abiotic factors. We explored the links between abiotic conditions, flowering phenology, and FCP in the winter‐flowering geophyte Anemone ...
Tzlil Labin, Banisha Phukela, Tamar Keasar, Nirit Lavie‐Alon, Yuval Sapir   +4 more
wiley   +1 more source

The middle Waikato Basin and hills [PDF]

, 1992
The middle Waikato (or Hamilton) Basin is a roughly oval-shaped depression more than 80 km north to south and more than 40 km wide. The basin, except in the south, is almost completely surrounded by ranges up to 300 m high, broken by only a few gaps.
Lowe, David J., Selby, Michael J.
core   +1 more source

Early Neoproterozoic limestones from the Gwna Group, Anglesey [PDF]

, 1998
Limestone megaclasts up to hundreds of metres in size are present within the Gwna Group mélange, North Wales, UK. The mélange has been interpreted as part of a Peri-Gondwanan fore-arc accretionary complex although the age of deposition remains ...
JANA M. HORÁK, JANE A. EVANS, O'Brian, Blatt, Matthew, Shackleton, Dickin, Gibbons, Denison, McCausland, Montañez, Schuster, Shackleton, Shields, Walter, White, Wood   +16 more
core   +4 more sources

Geomorphology and Sedimentology of a Rapidly Retreating Alpine Glacier: Insights From the Taschachferner, Tirol, Austria

Earth Science, Systems and Society
The rapid retreat and fragmentation of Alpine glaciers is widely reported as humanity faces dramatic climate change in mountainous regions. This rapid change leads to changes in sedimentary processes, which are exposed in recently deglaciated regions ...
D. P. Le Heron, P. Mejías Osorio, M. Heninger, B. J. Davies   +3 more
doaj   +1 more source

Gypsum Gardens: Self‐Assembled Tubular Structures of Calcium Sulfate with Relevance for the Detection of Extraterrestrial Life

Angewandte Chemie International Edition, EarlyView.
Chemical gardens are self‐assembled architectures with “life‐like” morphologies that form in the absence of any biological activity. Here we show that such structures can also be obtained by contacting reservoirs of calcium and sulfate ions, under conditions that plausibly emulate those prevailing on early Mars.
Selina Reigl, Elisabeth Wagner, Carlos Pimentel, Werner Kunz, Alexander E. S. Van Driessche, Matthias Kellermeier   +5 more
wiley   +1 more source

Geology and geochemistry of sulfide and sulfate deposition [PDF]

Factors contributing to the geology and geochemistry of sulfide and sulfate deposition are discussed.
Holser, W. T.
core   +1 more source