On the flanks of dormant Miravalles volcano, systematic fieldwork and radiocarbon dating buried humus-rich soils (paleosols) wood fragments, augmented by mineralogical geochemical analysis, reveal extensive previously undocumented Holocene activity. Phase 1 consisted a ~ 6300 BCE (8.3 ka) volcanic debris avalanche thick lapilli blast fallout deposit that appear coeval. Hiatus marks 2600 years i...

Abstract Proximal deposits of small-volume trachytic eruptions are an under-studied record eruption dynamics despite being common across a range settings. The 59 ± 4 ka Echo Canyon deposits, Ascension Island, resulted from explosive-effusive eruption. Variations in juvenile clast texture reveal changes ascent and transitions style. Five dominant textural types identified within the pumice lapil...

the area is located 20 km northwest of kashmar and about 4 km of kalateh taimour in khorasan razavi province. the study area is part of tertiary volcanic-plutonic belt north of daruneh fault and its situation in tectonic inliers between two important active faults, doruneh and taknar. volcanic rocks are mainly intermediate to acid pyroclastic type. they formed during early tertiary. the volcani...

Mafic volcanism accounts for 80% of magmas erupted on Earth. Although the majority these eruptions are effusive to Strombolian and fountain-fed, large explosive mafic do occur. This work uses deposits pyroclast textures from 12.6 ka Curacautín ignimbrite eruption Llaima volcano constrain conditions that drove this extrapolate findings provide insights into promote large-volume, elsewhere. The (...

of a thesis at the University of Miami. Atlantic bluefin tuna (Thunnus thynnus) are the largest and most highly prized among the tuna family. They are highly pelagic, undertaking transoceanic migrations throughout the Atlantic, but the main spawning grounds are the Mediterranean Sea and the Gulf of Mexico (GOM). Given their mobility, management for this species is handled through international ...

Over the last several hundred years, Stromboli has been characterized by steady-state Strombolian activity. The volcanic products are dominated by degassed and highly porphyritic (HP-magma) black scoria bombs, lapilli and lava flows of basaltic shoshonitic composition. Periodically (about one to three events per year), more energetic explosive eruptions also eject light coloured volatile-rich p...