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Digitale Medien

Measurements of density underflows from Walensee, Switzerland (1976)

LAMBERT, ANDRÉ M. ; KELTS, KERRY R. ; MARSHALL, NEIL F.

Oxford, UK : Blackwell Publishing Ltd

Sedimentology 23 (1976), S. 0

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ISSN: 1365-3091

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Geologie und Paläontologie

Notizen: Speed and direction of bottom currents induced by density underflow of two sediment-laden rivers were measured by oceanographic current meters in the Walensee (= Lake of Walenstadt), Switzerland. The apparently shooting flow of currents (up to 30 cm/s in this study) is suggested as an explanation for laminations in turbidite sequences. The current speed apparently stabilizes on slopes around 2°; this angle seems to correspond to the critical slope where the flow of the measured currents becomes steady. Current direction is controlled by bottom topography and direction of river inflow. Reversal of current direction observed at two sites is probably due to the underflow-induced backward motion of the overlying lake water. Underflow activity in Walensee is correlative with density peaks of the river water input. The currents are compared to Lake Mead (Southwestern U.S.) underflows and sporadic currents in some submarine canyons.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1365-3091.1976.tb00040.x

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Digitale Medien

Pulsating turbidity currents with relationship to high swell and high tides (1975)

SHEPARD, FRANCIS P. ; MARSHALL, NEIL F. ; MCLOUGHLIN, PATRICK A.

[s.l.] : Nature Publishing Group

Nature 258 (1975), S. 704-706

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The computerised current meter record showing the times and velocities of upcanyon and downcanyon flows clearly indicates a change in the pattern during the period of high swell. Before and after the large waves, there was an alternation of flows up and down the canyon with velocities not exceeding ...