Loading of a large diamicton mass in glacial Lake Maumee III sediments, southwestern Ontario

1987 ◽  
Vol 24 (4) ◽  
pp. 844-849
Author(s):  
Robert A. Stewart
Keyword(s):  
Large Scale ◽  
Gravity Flow ◽  
Glacial Lake ◽  
Sedimentary Structures ◽  
Sediment Gravity Flow

An 8 m long pod-shaped mass of deformed diamicton and sand occurs in Lake Maumee III glaciolacustrine sediments of the Port Stanley Drift, near Port Bruce, Ontario. Sedimentary structures observed in the diamicton mass and enclosing sands indicate large-scale loading accompanied their deposition. The lithology of the mass resembles admixed Port Stanley and Catfish Creek tills, which occur in moraines and other bodies of drift nearby. The diamicton mass may have been deposited en masse from seasonal or glacial floating ice or by subaquatic sediment gravity flow from floating ice or local moraines.

Subaqueous outwash deposits in the Ingraham ridge, Chazy, New York

1988 ◽  
Vol 25 (9) ◽  
pp. 1384-1396 ◽  
Author(s):  
John A. Diemer
Keyword(s):  
New York ◽  
Grain Size ◽  
Shallow Water ◽  
Full Length ◽  
Gravity Flow ◽  
Western Margin ◽  
The Core ◽  
Sedimentary Structures ◽  
Sediment Gravity Flow ◽  
Sand And Gravel

A 1.5 km segment of Ingraham ridge, a stratified sand and gravel ridge in northeastern New York, is composed dominantly of subaqueous outwash deposits. The core of the ridge segment may include subordinate subglacial tunnel deposits. The subaqueous outwash is composed mainly of interbedded sediment gravity flow, bar, dune, and ripple deposits that occur in channels. Sheetlike cross-stratified and cross-laminated deposits also are common, particularly on the distal western margin of the ridge segment. The ridge segment is draped by glaciolacustrine laminated sand, silt, and clay and glaciomarine massive mud. Westward decrease in grain size and scale of sedimentary structures is attributed to confining ice walls of an asymmetric embayment. Sediments are deformed in part by the melting of adjacent and buried ice. The ridge was modified during Champlain Sea regression and the reworked deposits were colonized by shallow-water organisms. Reworking may have been minor, and the broad, low morphology of the ridge may be due to subaqueous outwash deposition along its full length during retreat of the ice margin.

Causes of varied sediment gravity flow types on the Alsek Prodelta, northeast Gulf of Alaska

1988 ◽  
Vol 7 (4) ◽  
pp. 317-342 ◽  
Author(s):  
William C. Schwab ◽  
Homa J. Lee ◽  
Bruce F. Molnia
Keyword(s):  
Gulf Of Alaska ◽  
Gravity Flow ◽  
Sediment Gravity Flow

Slumping and a sandbar deposit at the Cretaceous-Tertiary boundary in the El Tecolote section (northeastern Mexico): An impact-induced sediment gravity flow

Geology ◽  
2001 ◽  
Vol 29 (3) ◽  
pp. 231 ◽  
Author(s):  
Ana R. Soria ◽  
Carlos L. Liesa ◽  
Maria Pilar Mata ◽  
José A. Arz ◽  
Laia Alegret ◽  
...  
Keyword(s):  
Gravity Flow ◽  
Sediment Gravity Flow ◽  
Northeastern Mexico

scholarly journals Facies Evaluation and Depositional Environments of Carbonates of the Bagh Group, Dhar District, Madhya Pradesh, India

2021 ◽  
Vol 38 (1) ◽  
pp. 33-40
Author(s):  
Sreejita Chatterjee ◽  
Dhiren Kumar Ruidas
Keyword(s):  
Grain Size ◽  
Large Scale ◽  
Energy Condition ◽  
Size Variation ◽  
High Energy ◽  
Depositional Environments ◽  
Small Scale ◽  
Peninsular India ◽  
Sedimentary Structures ◽  
Nodular Limestone

A significant event of marine transgression took place in Central India during Late Turonian-Coniacian. Fossiliferous marine succession of Bagh Group is one of the few carbonate successions exposed in peninsular India which was in focus of the current study for understanding this event. The signatures of this event were identified in the carbonate succession. The carbonates of Bagh Group are composed of two formations: the lower part is represented by Nodular limestone Formation which is overlain by Bryozoan limestone Formation at the top. On the basis of grain size variation and sedimentary structures, the Nodular limestone is divisible into three facies: facies ‘A’, facies ‘B’ and facies ‘C’. A hardground exists between facies B and facies C. Lack of sedimentary structures and high mud content indicates low energy depositional setting for the Nodular limestone Formation. Similarly, Bryozoan limestone Formation is divisible into five facies: facies ‘D’, facies ‘E’, facies ‘F’, facies ‘G’ and facies ‘H’ based on grain size variation and sedimentary structures. All of these five facies are fossiliferous. Glauconites are present within facies ‘G’ and have two modes of occurrence - as infilling within Bryozoan limestone and as altered feldspar. Presence of both small- and large-scale cross-stratification in Bryozoan limestone with lesser mud content are indicative of high energy shallow marine conditions. Large-scale cross-stratifications are possibly representing tidal bars while the small scale cross stratifications are formed in inter bar setting. Presence of reactivation surfaces within facies ‘E’ also supports their tidal origin. Increase in depositional energy condition is also evident from dominated by packstone facies.

scholarly journals High frequency of sediment gravity flow events in the Var submarine canyon (Mediterranean Sea)

2009 ◽  
Vol 263 (1-4) ◽  
pp. 1-6 ◽  
Author(s):  
Alexis Khripounoff ◽  
Annick Vangriesheim ◽  
Philippe Crassous ◽  
Joel Etoubleau
Keyword(s):  
Mediterranean Sea ◽  
High Frequency ◽  
Submarine Canyon ◽  
Gravity Flow ◽  
Sediment Gravity Flow

scholarly journals The gravity flow dynamics of submarine fan sedimentation in the Magura Basin of the Western Carpathians (Magura Nappe, Slovakia)

2010 ◽  
Vol 61 (3) ◽  
pp. 201-209 ◽  
Author(s):  
František Teťák
Keyword(s):  
Deep Water ◽  
Flow Dynamics ◽  
Western Carpathians ◽  
Gravity Flow ◽  
Submarine Fan ◽  
Sedimentary Structures ◽  
Gravity Flows ◽  
Bed Thickness ◽  
Change Position ◽  
Current Arrangement

The gravity flow dynamics of submarine fan sedimentation in the Magura Basin of the Western Carpathians (Magura Nappe, Slovakia)This article deals with the dynamics of the deep-water gravity flows sedimentation within the Magura Formation. This investigation is based on analysis of the Magura sandstone sedimentary structures studied on the outcrops. The final comparison of the sedimentary structures and cycles with the paleocurrent directions provided an interpretation of the gravity flows dynamics and helped to restore the migration of the sandy lobes in space and time. Three modes of sedimentation are recorded: regular cyclic sedimentation from the lobe, irregular sedimentation from the immature lobe and pelitic sedimentation on the basin plane without the lobe influence. We compared the occurrence of some sedimentary structures with the changes of the current directions and bed thickness. The following interpretations of gravity flow fan dynamics are results of this comparision: the fan consists of one or several lobes, the lobe branches out into branches with the radial current arrangement, the lobes laterally change position and the lobes suddenly die out.

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