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lysocline

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Journal Article
Journal: Geology
Published: 01 January 1978
Geology (1978) 6 (1): 11–15.
... numerous closely spaced reflectors, whereas such sediments in great water depths (> 5,000 m) typically show an acoustically transparent layer. The levels at which these transitions occur roughly correlate with the present lysocline and the calcite compensation depth, which correspond to water depths...
Image
Model of glacial water masses and the aragonite lysocline in the western Atlantic during the last glacial maximum (adapted from Henrich et al., 2003). ACD: Aragonite Compensation Depth.
Published: 01 January 2017
Figure 7. Model of glacial water masses and the aragonite lysocline in the western Atlantic during the last glacial maximum (adapted from Henrich et al., 2003 ). ACD: Aragonite Compensation Depth.
Series: Cushman Special Publications
Published: 01 January 1975
EISBN: 9781970168075
... ABSTRACT The foraminiferal lysocline, defined as the boundary zone between well-preserved and poorly preserved foraminiferal assemblages on the sea floor, is not by necessity a level of accelerated dissolution or “lysocline” in a general sense, such as found by Peterson (1966). The foram...
Image
Schematic representation of the TAZ for pelagic environments (not to scale). Note that dissolution begins in the water column well above the sediment-water interface. This schematic shows how dissolution can be used as a proxy for paleoceanographic conditions. (The asterisk after lysocline indicates that although aragonite dissolves at shallower depths than calcite, only one lysocline is illustrated here.)
Published: 12 March 2018
lysocline indicates that although aragonite dissolves at shallower depths than calcite, only one lysocline is illustrated here.)
Series: Cushman Special Publications
Published: 01 January 1975
EISBN: 9781970168075
... lysocline is difficult to define, but can be recognized near 4,000 m depth as a considerable drop in diversity of assemblages with respect to the solution resistance of their members. A comparison of dissolution aspects of coccoliths and forams shows that coccolith dissolution indices are sensitive above...
Journal Article
Published: 01 February 1996
Journal of the Geological Society (1996) 153 (1): 175.
... Cretaceous chalks were deposited in extensive, relatively shallow, shelf seas. One of the most important factors determining the fate of calcareous microfossils is the existence of a lysocline and the calcite compensation depth. The lysocline is a depth below which calcareous microfossils undergo significant...
Journal Article
Published: 01 September 1983
Journal of Sedimentary Research (1983) 53 (3): 719–731.
... the Holocene, the lysocline is located between 4050 m and 4350 m; the CCD is not present even in the deepest sample (4980 m). The late glacial ( approximately 18,000 years B.P.) lysocline may have shoaled to about 2500 m, whereas during early glacial time ( approximately 72,000 B.P.) it deepened to about 3400...
Series: Cushman Special Publications
Published: 01 January 1975
EISBN: 9781970168075
..., but according to the location with respect to the lysocline the information registered in the cores varies. Below the lysocline the magnitude of the fluctuations in the solution intensity is large. Near the lysocline the changes are relatively small. The increased solution intensity results in higher relative...
Journal Article
Journal: PALAIOS
Published: 12 March 2018
PALAIOS (2018) 33 (3): 85–93.
... lysocline indicates that although aragonite dissolves at shallower depths than calcite, only one lysocline is illustrated here.) ...
FIGURES | View All (7)
Journal Article
Journal: PALAIOS
Published: 01 August 1998
PALAIOS (1998) 13 (4): 311–334.
... calcitic fossils that show grain corrosion at northern Midcontinent localities (Nebraska/Iowa) indicate deposition under oxic to slightly dysoxic conditions within the calcite lysocline but below the aragonite compensation depth for this particular sea. Southward (Kansas), sparser calcitic faunas indicate...
Journal Article
Journal: Geology
Published: 01 July 1978
Geology (1978) 6 (7): 388–391.
... in deep-water sediments, just above the calcite compensation depth, primarily reflect glacial-interglacial differences in carbonate preservation, our results suggest that the pattern of glacial-interglacial sedimentation in shallower cores, near the lysocline, primarily reflects productivity changes...
Series: GSA Memoirs
Published: 01 January 1975
DOI: 10.1130/MEM143-p1
.... B.P., dissolution rates at depth began to increase again, but this increase was compensated for either by a large increase in the carbonate supply or by a depression of the lysocline. As a result, until about 26 m.y. B.P., a very broad and extensive equatorial carbonate zone with maximal accumulation...
Journal Article
Journal: Geology
Published: 01 January 1975
Geology (1975) 3 (1): 29–33.
... on a ridge. Coccolith ooze and rarer radio-larian limestone were deposited on basin floors which were generally below the lysocline. Planktonic foraminifera deposited above the lysocline on basin walls were sporadically swept down into the basins as turbidity currents and, because of this rapid deposition...
Journal Article
Journal: GSA Bulletin
Published: 01 October 1970
GSA Bulletin (1970) 81 (10): 3157–3160.
...G. ROSS HEATH; CHARLES CULBERSON Abstract The hydrographic features that appear to control the distribution of calcite in deep-sea sediments are the level at which the water passes from super- to undersaturation, and the level at which the rate of dissolution increases abruptly (the lysocline...
Journal Article
Journal: GSA Bulletin
Published: 08 January 2025
GSA Bulletin (2025) 137 (5-6): 2545–2564.
... in the Guadalupian Epoch exhibit substantial temporal and spatial heterogeneity on a global scale. Alterations in the oceanic environment likely caused the shoaling of the lysocline and calcite compensation depth (CCD). This allowed cherts to be deposited instead of carbonates, even in relatively shallow-marine...
FIGURES | View All (11)
Image
Figure 7. Paleoecologic reconstruction of Pardonet Formation showing facies distribution of halobiid and monotid bivalves, ammonoids, and radiolarians. ACD = aragonite compensation depth, LYS = lysocline, and MWB = mean wave base.
Published: 01 July 2011
Figure 7. Paleoecologic reconstruction of Pardonet Formation showing facies distribution of halobiid and monotid bivalves, ammonoids, and radiolarians. ACD = aragonite compensation depth, LYS = lysocline, and MWB = mean wave base.
Image
—Estimated depths of carbonate dissolution levels during Jurassic time in southern Alps. Lithologic facies are shown along three calculated age-versus-depth curves for southern Alps (Fonzaso, Vas, and near Brescia) and also for typical section on Ligurian ophiolites, whose age-versus-depth curve is assumed to follow equation Depth = 2,700 + 350(Age)1/2. ALY, aragonite lysocline; ACD, aragonite compensation depth; CLY, calcite lysocline; CCD, calcite compensation depth. Dissolution levels are drawn to keep red nodular limestones (Ammonitico Rosso) between ALY and ACD; aptychus limestones (Fonzaso, Rosso ad aptici) between ACD and CLY; radiolarites (i.e., well-bedded, ribbon) below CCD; Knobby radiolarites between CLY and CCD; nannofossil limestone (Maiolica) above CC. Depth estimates are for this region only, and should not be regarded as having global significance.
Published: 01 March 1981
-depth curve is assumed to follow equation Depth = 2,700 + 350(Age) 1/2 . ALY , aragonite lysocline; ACD , aragonite compensation depth; CLY , calcite lysocline; CCD , calcite compensation depth. Dissolution levels are drawn to keep red nodular limestones (Ammonitico Rosso) between ALY and ACD
Journal Article
Published: 01 January 2017
Journal of Foraminiferal Research (2017) 47 (1): 56–69.
...Figure 7. Model of glacial water masses and the aragonite lysocline in the western Atlantic during the last glacial maximum (adapted from Henrich et al., 2003 ). ACD: Aragonite Compensation Depth. ...
FIGURES | View All (6)
Image
Schematic diagram of the processes involved in biologically mediated settling and dissolution in pelagic material: bacterial action, copepod feeding, settling acceleration processes in marine snow and fecal pellets, increased fragmentation due to dissolution below the lysocline, and complete dissolution below the CCD (not to scale).
Published: 12 March 2018
Fig. 5.— Schematic diagram of the processes involved in biologically mediated settling and dissolution in pelagic material: bacterial action, copepod feeding, settling acceleration processes in marine snow and fecal pellets, increased fragmentation due to dissolution below the lysocline
Journal Article
Published: 01 October 2013
Journal of Foraminiferal Research (2013) 43 (4): 406–414.
... in the South China Sea (6°9.4N, 112°33.1E; Sarnthein and others, 1994 ). Here the calcite lysocline and the CCD are located at water depths of ~3200 m and 4000 m, respectively ( Calvert and others, 1993 ; Miao and Thunell, 1993 ) with the calcite-saturation horizon close to 2500 m ( Chou and others, 2007...
FIGURES | View All (6)