Variability in normal-incidence acoustic response in shallow-water marine sediments

In the region across the Serbian/Bulgarian state border, there are individualized 5 Jurassic paleogeographic units (from West to East): (1) the Thracian Massif Unit without Jurassic sediments; (2) the Luznica-Koniavo Unit - partially with Liassic in Grsten facies and with deep water Middle Callovian-Kimmeridgian (p. p) sediments of the type "ammonitico rosso", and Upper Kimmeridgian-Tithonian siliciclastics flysch; (3) The Getic Unit subdivided into two subunits - the Western Getic Sub-Uni - without Lower Jurassic sediments and the Eastern Getic Sub-Unit with Lower Jurassic continental and marine sediments, which are followed in both sub-units by carbonate platform limestones (type Stramberk); (4) the Infra (Sub)-Getic Unit - with relatively deep water Liassic and Dogger sediments (the Dogger of type "black shales with Bossitra alpine") and Middle Callovian-Tithonian of type "ammonitico rosso"; (5) the Danubian Unit - with shallow water Liassic, Dogger and Malm (Miroc-Vrska Cuka Zone, deep water Dogger and Malm (Donjomilanovacko-Novokoritska Zone).

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Inference of Sound Attenuation in Marine Sediments from Modal Dispersion in Shallow Water

Underwater Acoustics and Ocean Dynamics ◽

10.1007/978-981-10-2422-1_1 ◽

2016 ◽

pp. 1-9

Author(s):

N. Ross Chapman ◽

Juan Zeng

Keyword(s):

Shallow Water ◽

Marine Sediments ◽

Sound Attenuation ◽

Modal Dispersion

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In situ measurement of transverse isotropy in shallow-water marine sediments

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(91)90298-z ◽

1991 ◽

Vol 28 (5) ◽

pp. 292

Keyword(s):

Shallow Water ◽

Marine Sediments ◽

Transverse Isotropy ◽

In Situ Measurement

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Acoustic response of an unexploded ordnance in shallow water, layered, environments: Predictions using hybrid and coupled modeling techniques

The Journal of the Acoustical Society of America ◽

10.1121/1.4969185 ◽

2016 ◽

Vol 140 (4) ◽

pp. 2968-2968

Author(s):

Aubrey L. Espana ◽

Ahmad T. Abawi ◽

Steven G. Kargl ◽

Kevin L. Williams

Keyword(s):

Shallow Water ◽

Unexploded Ordnance ◽

Acoustic Response ◽

Coupled Modeling ◽

Modeling Techniques

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The Yorkshire Dogger: III. Upper Eskdale

Geological Magazine ◽

10.1017/s0016756800076469 ◽

1943 ◽

Vol 80 (6) ◽

pp. 209-230 ◽

Cited By ~ 6

Author(s):

R. H. Rastall ◽

J. E. Hemingway

Keyword(s):

Shallow Water ◽

Sea Level ◽

Marine Sediments ◽

Sea Water ◽

Second Phase ◽

Faunal Assemblage ◽

Chemical Changes ◽

Main Series ◽

Uplift And Erosion ◽

Shallow Water Sediments

1. A sequence of strata is determined in the Dogger of Upper Eskdale and its tributary valleys. The rocks fall into three main series, which are subdivided into groups.2. The underlying Yeovilian sediments, originally included with the Dogger, are mapped and briefly described. The unconformity between them and the Dogger is emphasized.3. The Dogger is marine throughout but only the oldest yields an adequate faunal assemblage, similar to that of the Glaisdale Oolite Series (upper opalinum). The greater part of the Dogger of this area is therefore younger than that of the Yorkshire Coast.4. Chemical changes in the sea-water caused the deposition of siderite to characterize the earliest phase (Glaisdale Oolite Series). This was succeeded by a phase of dominantly chamosite deposition (the Chamositic Series) followed by a reversion to siderite deposition (the Ajalon Series).5. Earth-movement controlled sedimentation over the area. During the first phase an eastern tilt to the region held the centre and west above or near sea-level, where it received no sediment. The second phase saw general depression with the accumulation of shallow water sediments. This was followed by uplift and erosion when a broad shallow valley was cut. Partial depression then flooded the valley with derived marine sediments.

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