Results 31 to 40 of about 51,586 (326)
Generation of volcanic ash by basaltic volcanism [PDF]
The recent eruptions of Eyjafjallajökull and Grimsvötn volcanoes in Iceland demonstrate the importance of a better understanding of processes leading to the formation of volcanic ash, specifically of fine volcanic ash that poses a threat to air traffic.
Bernd Zimanowski+4 more
openaire +2 more sources
Wavelength‐dependent mid‐infrared (400–1,800 cm−1; 5.56–25 μm) optical constants (real and imaginary indices of refraction; n and k) are determined using reflectance spectra at a spectral sampling of 4 cm−1 for several silicate glasses of varying SiO2 wt%
I. Varatharajan+3 more
doaj +1 more source
DOI:10.17014/ijog.3.2.77-94Bayat Complex is usually used as a work field for students of geology and other geosciences. The study area is located in the southern part of the Bayat Complex.
Sri Mulyaningsih
doaj +1 more source
An Effusive Lunar Dome Near Fracastorius Crater: Spectral and Morphometric Properties
We examine a dome within the boundary between Fracastorius crater and Mare Nectaris. The dome has a noticeable vent structure and appears to be perpendicular to wrinkle ridges in the southern Mare Nectaris basin.
Caitlin Ahrens, Raffaello Lena
doaj +1 more source
Explosive volcanism resulting in stratospheric injection of sulfate aerosol is a major driver of regional to global climatic variability on interannual and longer timescales. However, much of our knowledge of the climatic impact of volcanism derives from
Francis Ludlow+9 more
doaj +1 more source
Volcanism is the largest natural source of mercury (Hg) to the biosphere. However, past Hg emission estimates have varied by three orders of magnitude. Here, we present an updated central estimate and interquartile range (232 Mg a−1; IQR: 170–336 Mg a−1)
Benjamin M. Geyman+3 more
doaj +1 more source
Explosive volcanism as a key driver of the late Paleozoic ice age
Atmospheric CO2 exerts a robust and well-documented control on Earth’s climate, but the timing of glaciation during the late Paleozoic Ice Age (LPIA; ca. 360–260 Ma) is inconsistent with pCO2 reconstructions, hinting at another factor.
G. Soreghan, M. Soreghan, N. Heavens
semanticscholar +1 more source
Significance Declining oxygen contents in today’s oceans highlight the need to better understand ancient, natural marine deoxygenation and associated extinctions.
T. Them+9 more
semanticscholar +1 more source
Planetary geologic maps are usually carried out following a morpho-stratigraphic approach where morphology is the dominant character guiding the remote sensing image interpretation.
Andrea Semenzato+7 more
doaj +1 more source