?Base surge?-Ablagerungen auf Santorin

The youngest pre-caldera volcanism of Deception Island is represented by a thick sequence of subaerial pyroclastic deposits which has been grouped as the Yellow Tuff Formation. Most of these deposits were related to the explosive activity of a central vent which was destroyed during the formation of the caldera. Two members can be distinguished in this formation. The lower member is mainly composed of 1 to 12 m thick massive pyroclastic flow deposits with interbedded air-fall and surge deposits. The upper member is in stratigraphical continuity with the lower member and consists of base surge deposits with minor air-fall and thin pyroclastic flow deposits. The pre-caldera deposits have undergone a palagonitic alteration which produced crystallization of smectites, Fe-oxides, zeolites and calcite.

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Part V. An experimental study of the collapse of fluid columns on a rigid horizontal plane, in a medium of lower, but comparable, density

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences ◽

10.1098/rsta.1952.0007 ◽

1952 ◽

Vol 244 (882) ◽

pp. 325-334 ◽

Cited By ~ 15

Keyword(s):

Experimental Study ◽

Horizontal Plane ◽

Scaling Laws ◽

Circular Cylinders ◽

Qualitative And Quantitative ◽

Simple Scaling ◽

Base Surge

The results of an investigation of collapse of fluid right-circular cylinders in a medium of comparable density are described. Qualitative and quantitative similarities between the surges produced by the collapse of such columns and the base surge observed at Bikini are examined, and by the use of simple scaling laws, an estimate of the quantity of finely divided water in the stem of the column of the Bikini plume is obtained.

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Interpreting ambiguous bedforms to distinguish subaerial base surge from subaqueous density current deposits

The Depositional Record ◽

10.1002/dep2.20 ◽

2016 ◽

Vol 2 (2) ◽

pp. 173-195 ◽

Cited By ~ 9

Author(s):

Benjamin L. Moorhouse ◽

James D. L. White

Keyword(s):

Density Current ◽

Base Surge

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Hazardous Base Surges of Taal’s 2020 Eruption

10.21203/rs.3.rs-385254/v1 ◽

2021 ◽

Author(s):

Mario Aurelio ◽

Richard Ybanez ◽

Audrei Anne Ybanez ◽

Jolly Joyce Sulapas ◽

Criselda Baldago ◽

...

Keyword(s):

Remote Sensing ◽

Numerical Methods ◽

Coastal Communities ◽

Primary Data ◽

Taal Volcano ◽

Empirical Information ◽

Base Surge

Abstract After 43 years of repose, Taal Volcano erupted on 12 January 2020 forming hazardous base surges. Using field, remote sensing (i.e. UAV and LiDAR), and numerical methods, we gathered primary data to generate well-constrained empirical information on dune bedform characteristics, impact dynamic pressures and velocities of base surges to advance our knowledge on this hazard to understand and evaluate its consequences and risks. The base surges traveled at 50-60 km/hr near the crater and decelerated before making impact on coastal communities with dynamic pressures of at least 1.7-2.1 kPa. The base surges killed more than a thousand livestock in the southeast of Taal Volcano Island, and then traveled another 600 meters offshore. This work is a rare document of a complete, fresh and practically undisturbed base surge deposit, important in the study of dune deposits formed by volcanic, and other processes on Earth and other planets.

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Antidune and chute and pool structures in the base surge deposits of the Laacher See area, Germany

Sedimentology ◽

10.1111/j.1365-3091.1973.tb01632.x ◽

1973 ◽

Vol 20 (4) ◽

pp. 553-574 ◽

Cited By ~ 146

Author(s):

HANS-ULRICH SCHMINCKE ◽

RICHARD V. FISHER ◽

AARON C. WATERS

Keyword(s):

Base Surge

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