Results 61 to 70 of about 69,547 (334)

A study of radioactive elements of various rocks in Pattani Province with gamma ray spectrometer [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2002
The radioactivity of the three elements, potassium, uranium and thorium, in rocks of various types in Pattani Province was investigated by using a gamma ray spectrometer.
Kaewtubtim, P., Changkean, S., Hmsuree, H.   +2 more
doaj  

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

Metamorphism and Metamorphic Rocks

, 2013
In the previous chapters, we learned about igneous and sedimentary rocks. This chapter presents some general concepts concerned with the process of metamorphism and the formation of metamorphic rocks. How pressure, temperature, and fluids control metamorphic processes and resulting metamorphic changes are discussed.
openaire   +2 more sources

Constructing a cave sediment stratigraphy for the Dachstein Massif sheds light on landscape evolution (Eastern Alps)

The Depositional Record, EarlyView.
Five large Alpine cave systems on the Dachstein (Austria) were investigated and 35 sediment profiles or outcrops between 860 m a.s.l. and 1945 m a.s.l. were analysed. An altitude‐dependent overall stratigraphy is established and depositional conditions and palaeo‐environments are reconstructed.
Franziska Holzer, Lukas Plan, Susanne Gier   +2 more
wiley   +1 more source

Episodes of fissure formation in the Alps: connecting quartz fluid inclusion, fissure monazite age, and fissure orientation data

Swiss Journal of Geosciences, 2021
Fluid assisted Alpine fissure-vein and cleft formation starts at prograde, peak or retrograde metamorphic conditions of 450–550 °C and 0.3–0.6 GPa and below, commonly at conditions of ductile to brittle rock deformation.
Edwin Gnos, Josef Mullis, Emmanuelle Ricchi, Christian A. Bergemann, Emilie Janots, Alfons Berger   +5 more
doaj   +1 more source

A reference book on rocks and minerals of New England for gifted students in the intermediate grades. [PDF]

, 1959
Thesis (Ed.M.)--Boston ...
Carson, Janine A., Edwards, Harriet L.
core   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Ellam, R.M., Fallick, A.E., Graham, C.M., Thomas, C.W.   +3 more
core   +1 more source

Diagenetic processes controlled by volcanic detritus of the Lower‐Middle Permian Shanxi and Shihezi sandstone formations, North Ordos Basin, China

The Depositional Record, EarlyView.
Comparisons of Lower‐Middle Permian Shanxi and Lower Shihezi formations from the North Ordos Basin reveal that different types and percentages of volcanic detritus induced by active magmatic cycles can significantly change diagenetic evolution and favourable reservoirs.
Yuanlan Tang, Wei Jiang, Xianfeng Tan, Long Luo, Eduardo Garzanti, Jon Gluyas, Xueqi Yan, Jianping Liu, Tao Lei, Xuejiao Qu, Jia Wang, Xin Yu   +11 more
wiley   +1 more source

Worldwide distribution of continental rock lithology: Implications for the atmospheric/soil CO2 uptake by continental weathering and alkalinity river transport to the oceans [PDF]

, 2003
The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic ...
Amiotte Suchet, Philippe, Ludwig, Wolfgang, Probst, Jean-Luc   +2 more
core   +2 more sources

Sedimentary facies and architecture of mixed bioclastic‐siliciclastic deposits forming in an inferred strait environment: An example from the Early Pleistocene of Calabria, southern Italy

The Depositional Record, EarlyView.
Early Pleistocene mixed arenites and their associated conglomerates and sandstones were studied in detail in Calabria, southern Italy. This study suggests that the studied palaeo‐strait was not necessarily a wider and similarly oriented expression of the modern Strait of Messina.
Svea Franke, Effi‐Laura Drews, Ernesto Schwarz, Marcello Gugliotta   +3 more
wiley   +1 more source