Abstract This paper forensically reconstructs the timings, impacts and processes that drove sequence of explosive eruptions La Soufrière, St Vincent in April 2021 using a combination field-based stratigraphy textural dissection deposit character together with contemporary visual observations. Explosive activity on 9 early 10 involved destruction almost all 2020/2021 lava dome, c. 60% 1979 dome ...

Abstract In the design and construction of buildings infrastructures, reconstruction a reliable 3D engineering geological model is an essential step to optimize costs limit risks from failure or damage due unforeseen ground conditions. The modeling conditions challenging issue be tackled especially in case units with complex geometries spatially variable geotechnical properties. such direction,...

The submarine stratigraphy of the eastern Bay Naples is studied through seismo-stratigraphic data correlated with borehole data. Multichannel seismic profiles are interpreted in order to reconstruct stratigraphic relationships between Quaternary marine units and volcanic acoustic substratum. Seven recognized based on geological interpretation using criteria. top lowest unit was Campanian Ignimb...

Maars are monogenic volcanic edifices of peculiar morphology with a wide circular crater surrounded by a low gentle rim of erupted pyroclastic material. Craters of maars are deeply incised into underlying rocks (frequently down to the aquifer), which explains their frequent partial or complete water infill. Owing to their morphological peculiarities, maars are easily identifiable in air photos.

In this paper, we present results of tectonic and geophysical investigations in the Kenya Rift valley, Nakuru area. We compiled a detailed geological map area based on published earlier works, well data satellite imagery. The was then integrated with original fieldwork cross sections were constructed. key areas, performed survey using Electrical Resistivity Tomography (ERT), Hybrid Source Audio...

BACKGROUND Preservation of fossil vertebrates in volcanic rocks is extremely rare. An articulated skull (cranium and mandible) of a rhinoceros was found in a 9.2±0.1 Ma-old ignimbrite of Cappadocia, Central Turkey. The unusual aspect of the preserved hard tissues of the skull (rough bone surface and brittle dentine) allows suspecting a peri-mortem exposure to a heating source. METHODOLOGY/PRI...

Bolaang Mongondow is located on the Eastern North arm of Sulawesi. This area a Neogene-aged magmatic arc composed plutonic and volcanic rocks that indicate mineralization-bearing host rocks. The study aimed to determine geological setting alteration based observations geochemical analysis. method used mapping, followed by laboratory studio data lithology this andesite, diorite, pyroclastic brec...

We present a global survey of candidate pyroclastic deposits on Mercury, derived from images obtained during MESSENGER flybys 1–3 that provided near-global coverage at resolutions between 5 and 0.5 km/pixel. Thirty-five deposits were identified and characterized and are located principally on the floors of craters, along rims of craters, and along the edge of the Caloris basin. Deposits are com...

Submarine pyroclastic eruptions at depths greater than a few hundred meters are generally considered to be rare or absent because the pressure of the overlying water column is sufficient to suppress juvenile gas exsolution so that magmatic disruption and pyroclastic activity do not occur. Consideration of detailed models of the ascent and eruption of magma in a range of sea floor environments s...

Abstract We describe and interpret deposits associated with the final Ubehebe Crater-forming, phreatomagmatic explosive phase of multivent, monogenetic volcanic center. volcano is located in Death Valley, California, USA. Pyroclastic occur four main facies: (1) lapilli- blockdominated beds, (2) thinly bedded lapilli tuff, (3) laminated cross-laminated ash, (4) massive ash/tuff. Lapilli- block-d...