Pumice rafts are formed simultaneously when submarine volcanoes erupt, the pumice clasts breakup irregularly, forming irregularly shaped pumice stones which while floating through the ocean are colonized by marine biota. We analyze two eruption events and more than 5,000 pumice clasts collected from 29...
A mechanistic understanding of pumice floatation is a step towards understanding how pumice is partitioned into floating and sinking components and provides an estimate for the lifetime of pumice rafts in the ocean. Introduction Pumice is a highly vesicular volcanic rock with a porosity high enough...
In the western Pacific region of the Philippine Sea, encircled by arcs and trenches, tsunamis and pumice rafts have been documented (Fig. 1; Geological Survey of Japan, 2021; Soloviev and Go, 1974); however, paleotsunami and paleo-raft deposits are rarely reported due to low preservation ...
Kristen E. Fauria, a University of California, Berkeley, graduate student who led the study, which was published in Earth and Planetary Science Letters, noted that "the question of floating pumice has been around the literature for a long time, and it hadn't been resolved." "It was origina...
many volcanic areas and frequently occur together with various volcanic ashes and tuffs. High-grade pumice deposits are found abroad on the Lipari Islands of Italy. The chief deposits in the USSR are in the Armenian SSR (the Ani group) and the Northern Caucasus, in the vicinity of Nal’chik...
deep ocean. Figure 1: Sequential motion of pumice rafts from MODIS images in the first 3 weeks after the eruption. The Havre eruption presents us a rare opportunity for testing a large-scale natural particle release experiment in an area where interactions with coastlines and strong boundary ...
Understanding the relationship between pumice formation and long-term floatability in seawater is becoming increasingly important in terms of eruption dynamics, material cycles, biological and environmental effects, and ocean hazards. Pumice rafts were produced during the 2021 eruption of the Fukutoku-Oka...
As more magma was erupted, the collapse progressed until the dust settled to reveal a volcanic depression, called a caldera, 5 miles in diameter and one mile deep." [2]Pumice raft: View of a pumice raft from a boat. Waves can be seen moving under the pumice. The rafts can float for...
The Rock - Pumice IgneousRock Type:Extrusive Related to:Rhyolite,obsidian,scoria Chemistry:Acidic to intermediate and rarely basic Color:White, gray, off-white, light black or green Texture:Glassy Origins:Volcanic arcs generally Common Minerals:N/A ...
New model predicts pumice drift patterns.The article discusses a study of scientists to predict the drift patterns of the pumice rafts that were formed when the Havre volcano in the southwestern Pacific erupted in July 2012. Topics mentioned include the potential hazards the 400 square kilometers ...