Abyssal furrows and hyperbolic echo traces on the bahama outer ridge

Charles D. Hollister; Roger D. Flood; David A. Johnson; Peter Lonsdale; John B. Southard

doi:10.1130/0091-7613(1974)2<395:AFAHET>2.0.CO;2

Abyssal furrows and hyperbolic echo traces on the bahama outer ridge

Charles D. Hollister
, Roger D. Flood
, David A. Johnson
, Peter Lonsdale
, John B. Southard

Office of the Dean SOMAS

Woods Hole Oceanographic Institution
University of California at San Diego

Research output: Contribution to journal › Article › peer-review

89 Scopus citations

Abstract

Near-bottom investigations with a deep-towed instrument package show that steep-sided, flat-floored furrows (1 to 100 m wide by 0.5 to 20 m deep) eroded into Holocene and Pleistocene hemipelagic mud are responsible for the characteristic hyperbolic echo traces on surface-ship echograms recorded over the Bahama Outer Ridge (water depth, 4 to 5 km). This echogram character, previously interpreted as being caused by side reflections from depositional wave forms, has been typically recorded in abyssal regions of contour-current activity. It is suggested that these remarkably straight longitudinal furrows are formed by secondary helical circulations in the bottom-boundary mixed layer.

Original language	English
Pages (from-to)	395-400
Number of pages	6
Journal	Geology
Volume	2
Issue number	8
DOIs	https://doi.org/10.1130/0091-7613(1974)2<395:AFAHET>2.0.CO;2
State	Published - 1974

Access to Document

10.1130/0091-7613(1974)2<395:AFAHET>2.0.CO;2

Cite this

@article{2890d22d861a46d48a55be4d155e9008,

title = "Abyssal furrows and hyperbolic echo traces on the bahama outer ridge",

abstract = "Near-bottom investigations with a deep-towed instrument package show that steep-sided, flat-floored furrows (1 to 100 m wide by 0.5 to 20 m deep) eroded into Holocene and Pleistocene hemipelagic mud are responsible for the characteristic hyperbolic echo traces on surface-ship echograms recorded over the Bahama Outer Ridge (water depth, 4 to 5 km). This echogram character, previously interpreted as being caused by side reflections from depositional wave forms, has been typically recorded in abyssal regions of contour-current activity. It is suggested that these remarkably straight longitudinal furrows are formed by secondary helical circulations in the bottom-boundary mixed layer.",

author = "Hollister, \{Charles D.\} and Flood, \{Roger D.\} and Johnson, \{David A.\} and Peter Lonsdale and Southard, \{John B.\}",

year = "1974",

doi = "10.1130/0091-7613(1974)2<395:AFAHET>2.0.CO;2",

language = "English",

volume = "2",

pages = "395--400",

journal = "Geology",

issn = "0091-7613",

number = "8",

}

TY - JOUR

T1 - Abyssal furrows and hyperbolic echo traces on the bahama outer ridge

AU - Hollister, Charles D.

AU - Flood, Roger D.

AU - Johnson, David A.

AU - Lonsdale, Peter

AU - Southard, John B.

PY - 1974

Y1 - 1974

N2 - Near-bottom investigations with a deep-towed instrument package show that steep-sided, flat-floored furrows (1 to 100 m wide by 0.5 to 20 m deep) eroded into Holocene and Pleistocene hemipelagic mud are responsible for the characteristic hyperbolic echo traces on surface-ship echograms recorded over the Bahama Outer Ridge (water depth, 4 to 5 km). This echogram character, previously interpreted as being caused by side reflections from depositional wave forms, has been typically recorded in abyssal regions of contour-current activity. It is suggested that these remarkably straight longitudinal furrows are formed by secondary helical circulations in the bottom-boundary mixed layer.

AB - Near-bottom investigations with a deep-towed instrument package show that steep-sided, flat-floored furrows (1 to 100 m wide by 0.5 to 20 m deep) eroded into Holocene and Pleistocene hemipelagic mud are responsible for the characteristic hyperbolic echo traces on surface-ship echograms recorded over the Bahama Outer Ridge (water depth, 4 to 5 km). This echogram character, previously interpreted as being caused by side reflections from depositional wave forms, has been typically recorded in abyssal regions of contour-current activity. It is suggested that these remarkably straight longitudinal furrows are formed by secondary helical circulations in the bottom-boundary mixed layer.

UR - https://www.scopus.com/pages/publications/0000193788

U2 - 10.1130/0091-7613(1974)2<395:AFAHET>2.0.CO;2

DO - 10.1130/0091-7613(1974)2<395:AFAHET>2.0.CO;2

M3 - Article

AN - SCOPUS:0000193788

SN - 0091-7613

VL - 2

SP - 395

EP - 400

JO - Geology

JF - Geology

IS - 8

ER -

Abyssal furrows and hyperbolic echo traces on the bahama outer ridge

Abstract

Access to Document

Other files and links

Fingerprint

Cite this