A small, protected karstic feature exposed in a limestone quarry in Bermuda preserved abundant sedimentary and biogenic materials documenting a transgressive phase, still-stand, and regressive phase of a sea-level in excess of 21.3 m above present during Marine Isotope Stage (MIS) 11 (400 ka) as determined by U/Th dating and amino acid racemization. Cobbles and marine sediments deposited during...

Acid river systems and the actual situation of neutralization at Kusatsu-Shirane volcano, Gunma Prefecture, Ebino highlands Kirishima volcanoes, Miyazaki are reviewed. In case acid system sources water volcanic acidic hot springs mine drainage (AMD) from closed sulfur mines. Volcanic AMD have different effects on environment. Arsenic is predominantly supplied springs, heavy metals such as lead ...

Debris flows are particle–fluid mixtures that pose a significant hazard to many communities throughout the world. Bouldery debris often characterised by deep dry granular flow front, which is followed progressively thinner and increasingly watery tail. The formation of highly destructive bouldery wave fronts usually attributed particle-size segregation. However, moving-bed flume experiments Dav...

Abstract Dedolomites, the replacement of dolomite by calcite, are widely distributed in Ordovician Majiagou Formation southeastern Ordos Basin, China, which critically affects reservoir quality throughout region. Two types dedolomites were recognized upper 100 m Formation, namely brecciated dedolomite and crystalline dedolomite. The petrographic geochemical data reveal that investigated often a...

Field studies were carried out on the earthen dam of channel reservoir Tuyamuyun hydrosystem Amudarya River (Uzbekistan), which was put into operation in 1984 according to traditional method using control and measuring equipment embedded body dam. The water levels upper lower reaches, piezometers, drainage discharge measured. Maximal 130.00 head race observed middle October minimal 117.00 March...

Abstract We estimate the mass and energy budgets for 2018 phreatic eruption of Mt. Motoshirane on Kusatsu–Shirane volcano, Japan, based data obtained from a network eight tiltmeters weather radar echoes. The tilt records can be explained by subvertical crack model. Small craters that were formed previous eruptions are aligned WNW–ESE, which is consistent with strike modeled in this study. direc...

The meteoric water has obviously changed the physical properties of dolostone reservoirs in vertical vadose zone and horizontal phreatic zone, but its influence on shallow burial beneath surface is still unclear. This study aims to reveal effect through X-ray diffraction, cathodoluminescence, C, O, Sr isotope using sample from Majiagou Formation Daniudi gas field, Ordos Basin. diagenesis parage...