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Journal Article

Sediment supply versus storm winnowing in the development of muddy and shelly interbeds from the Upper Ordovician of the Cincinnati region, USA This article is one of a series of papers published in this Special Issue on the theme The dynamic reef and shelly communities of the Paleozoic. This Special is in honour of our colleague and friend Paul Copper . Available to Purchase

Benjamin F. Dattilo, Carlton E. Brett, Cameron J. Tsujita, Robert Fairhurst
Published: 26 March 2008
Canadian Journal of Earth Sciences (2008) 45 (2): 243–265.
DOI: https://doi.org/10.1139/E07-060
... and mudrocks. Despite years of study, the development of Cincinnatian shell beds and metre-scale cycles has, until recently, been attributed solely to storm reworking. This “storm-winnowing model” treats shells as passive sedimentary clasts, ignoring other factors of shell-bed development. A recently proposed...
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View PDF for article title, Sediment supply versus storm <span class="search-highlight">winnowing</span> in the development of muddy and shelly interbeds from the Upper Ordovician of the Cincinnati region, USA This article is one of a series of papers published in this Special Issue on the theme The dynamic reef and shelly communities of the Paleozoic. This Special is in honour of our colleague and friend Paul Copper .
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Journal Article

Framework dilation, winnowing, and matrix particle size; the behavior of some sand-gravel mixtures in a laboratory flume Available to Purchase

Andrew F. Allan, Lynne Frostick
Published: 01 January 1999
Journal of Sedimentary Research (1999) 69 (1): 21–26.
DOI: https://doi.org/10.2110/jsr.69.21
... movements were monitored using a new digital photographic and image analysis method that allows detection of mo-tions over periods as small as 0.04 s. The results show that, where flows are capable of moving only the finer material, grain size of the matrix is controlled by a combination of winnowing...
View PDF for article title, Framework dilation, <span class="search-highlight">winnowing</span>, and matrix particle size; the behavior of some sand-gravel mixtures in a laboratory flume
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Journal Article

Winnowing of Recent and late Quaternary deep-sea sediments; Colombia Basin, Caribbean Sea Available to Purchase

W. L. Prell
Published: 01 December 1977
Journal of Sedimentary Research (1977) 47 (4): 1583–1592.
DOI: https://doi.org/10.1306/212F73BA-2B24-11D7-8648000102C1865D
...W. L. Prell Abstract Sediments of the Colombia Basin, Caribbean Sea, contain evidence of current winnowing. Although bottom photographs reveal a relatively tranquil bottom over most of the basin, current smoothing of the seafloor is observed on and adjacent to the Hess and Beata Escarpments...
View PDF for article title, <span class="search-highlight">Winnowing</span> of Recent and late Quaternary deep-sea sediments; Colombia Basin, Caribbean Sea
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Journal Article

Winnowing; an important process in the concentration of the Stairway Sanstone (Ordovician) phosphorites of central Australia Available to Purchase

P. J. Cook
Published: 01 September 1967
Journal of Sedimentary Research (1967) 37 (3): 818–828.
DOI: https://doi.org/10.1306/74D717AD-2B21-11D7-8648000102C1865D
... pellets were formed the sediments were winnowed, the fines removed, and only the coarsest quartz grains and the phosphatic pellets and nodules remained. GeoRef, Copyright 2006, American Geological Institute. 1967 ...
View PDF for article title, <span class="search-highlight">Winnowing</span>; an important process in the concentration of the Stairway Sanstone (Ordovician) phosphorites of central Australia
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Journal Article

CLARIFICATION OF THE “WINNOWING” CONCEPT IN GEOLOGY Available to Purchase

ALISTAIR WILLIAM McCRONE
Journal: GSA Bulletin
Published: 01 April 1962
GSA Bulletin (1962) 73 (4): 517–518.
DOI: https://doi.org/10.1130/0016-7606(1962)73[517:COTWCI]2.0.CO;2
...ALISTAIR WILLIAM McCRONE Abstract The winnowing that leads to direct concentration of lag gravels differs in mechanism from the winnowing that indirectly permits depositional concentration of clean sands. NEW YORK UNIVERSITY, NEW YORK, N. Y. 15 12 1961 Copyright © 1962...
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Journal Article

Eustatic control of turbidites and winnowed turbidites Available to Purchase

G. Shanmugam, R. J. Moiola
Journal: Geology
Published: 01 May 1982
Geology (1982) 10 (5): 231–235.
DOI: https://doi.org/10.1130/0091-7613(1982)10<231:ECOTAW>2.0.CO;2
... currents, which winnow away the fines of turbidites. In the rock record, the occurrence of most turbidites and winnowed turbidites closely corresponds to global lowstands of paleo–sea level. This observation may be useful in predicting the occurrence of deep-sea reservoir facies in the geologic record...
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Comments and Reply on ‘Eustatic control of turbidites and winnowed turbidites’: COMMENT Available to Purchase

Henry T. Mullins
Journal: Geology
Published: 01 January 1983
Geology (1983) 11 (1): 57–58.
DOI: https://doi.org/10.1130/0091-7613(1983)11<57:CAROEC>2.0.CO;2
View PDF for article title, Comments and Reply on ‘Eustatic control of turbidites and <span class="search-highlight">winnowed</span> turbidites’: COMMENT
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Journal Article

Comments and Reply on ‘Eustatic control of turbidites and winnowed turbidites’: COMMENT Available to Purchase

J. G. Johnson
Journal: Geology
Published: 01 January 1983
Geology (1983) 11 (1): 58.
DOI: https://doi.org/10.1130/0091-7613(1983)11<58a:CAROEC>2.0.CO;2
View PDF for article title, Comments and Reply on ‘Eustatic control of turbidites and <span class="search-highlight">winnowed</span> turbidites’: COMMENT
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Comments and Reply on ‘Eustatic control of turbidites and winnowed turbidites’: REPLY Available to Purchase

G. Shanmugam, R. J. Moiola
Journal: Geology
Published: 01 January 1983
Geology (1983) 11 (1): 58–60.
DOI: https://doi.org/10.1130/0091-7613(1983)11<58b:CAROEC>2.0.CO;2
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(a) Winnowing mechanism whereby the bottom currents scour and reincorporate ash into the surrounding sediment and (b) bioturbation mechanism in which burrowing organisms break up and incorporate conglomerated fragments of ash within the sediment.

(a) Winnowing mechanism whereby the bottom currents scour and reincorporate... Available to Purchase

Published: 14 November 2017
Figure 8. (a) Winnowing mechanism whereby the bottom currents scour and reincorporate ash into the surrounding sediment and (b) bioturbation mechanism in which burrowing organisms break up and incorporate conglomerated fragments of ash within the sediment.
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Processes implied in the reworking of phosphorite. A. Winnowing of in situ authigenic francolite peloids in pristine phosphorite (buff) by storm waves produces a granular phosphatic lag (yellow). Pristine phosphorite forms during fair-weather periods and is hydraulically concentrated during storms. B. Transport and redeposition of francolite peloids during the largest storms produces granular phosphatic tempestites. Beds may be massive, indistinctly stratified, graded, or hummocky cross stratified. See text for discussion. C. Increasing storm frequency and intensity with time erode pristine phosphorite to produce a thick, amalgamated granular phosphorite bed. These stratiform ore deposits are primary exploration targets. After Pufahl et al. (2003), which expands on concepts developed by Föllmi et al. (1991), Grimm and Föllmi (1994), and Grimm (2000).

Processes implied in the reworking of phosphorite. A. Winnowing of in situ ... Available to Purchase

Published: 01 May 2017
Fig. 14. Processes implied in the reworking of phosphorite. A. Winnowing of in situ authigenic francolite peloids in pristine phosphorite (buff) by storm waves produces a granular phosphatic lag (yellow). Pristine phosphorite forms during fair-weather periods and is hydraulically concentrated
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Fold of the baseline and monitor 3 data sets after winnowing.

Fold of the baseline and monitor 3 data sets after winnowing. Available to Purchase

Published: 06 April 2017
Figure 2. Fold of the baseline and monitor 3 data sets after winnowing.
Image

Fig. 5. Storm-winnowing model of shell-bed generation; how shell beds are... Available to Purchase

Published: 26 March 2008
Fig. 5. Storm-winnowing model of shell-bed generation; how shell beds are winnowed from undifferentiated sediments. (A) sea-bottom conditions before and after a storm showing the three basic storm sediments; fair-weather mud is a shell rich deposit that is separated by winnowing into shell beds
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Winnowing away. Risk in all industries compared with risk in exploration and discovery in the mining industry. Adapted from Industrial Research Institute, 1999.

Winnowing away. Risk in all industries compared with risk in exploration an... Available to Purchase

Published: 01 April 2006
FIGURE 2. Winnowing away. Risk in all industries compared with risk in exploration and discovery in the mining industry. Adapted from Industrial Research Institute, 1999 .
Journal Article

Carapebus Member (Eocene), Campos Basin, Brazilian Offshore: An Example of Deep-Sea Fan Turbidites Winnowed by Bottom Currents: ABSTRACT Free

M. C. Barros, S. Possato, L. R. Guardado, E. Mutti
Journal: AAPG Bulletin
Published: 01 May 1982
AAPG Bulletin (1982) 66 (5): 545–546.
DOI: https://doi.org/10.1306/03B59BA7-16D1-11D7-8645000102C1865D
... analysis, E-log correlation patterns, and seismic data, these sand bodies are interpreted as original deep-sea fan sediments that were extensively winnowed by bottom currents. Indirect evidence for such an interpretation is given by the complete absence of thin-bedded and fine-grained turbidite sediments...
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Fig. 16. Partially Winnowed packstones. Like unwinnowed packstones above,... Available to Purchase

Published: 26 March 2008
Fig. 16. Partially Winnowed packstones. Like unwinnowed packstones above, the lower part or more than one subunit of these specimens lacks sedimentary structures diagnostic of winnowing. The fact that parts of the same specimens are winnowed is strong evidence that storm winnowing had an effect
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(A) Photo shows regolith-hosted rill where fine material has been winnowed away. (B) Upper McKim escarpment formed by highly erodible sandstone layer. (C) Bare bedrock limestone surface upstream of knickpoint created by Upper McKim escarpment. (D) Block-covered face of knickpoint formed by Upper McKim escarpment.

(A) Photo shows regolith-hosted rill where fine material has been winnowed ... Available to Purchase

Published: 15 September 2022
Figure 2. (A) Photo shows regolith-hosted rill where fine material has been winnowed away. (B) Upper McKim escarpment formed by highly erodible sandstone layer. (C) Bare bedrock limestone surface upstream of knickpoint created by Upper McKim escarpment. (D) Block-covered face of knickpoint formed
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—Presence or absence of glauconite and carbonaceous detritus divide sands into four main genetic groups: marine winnowed sands; nonmarine winnowed sands (often eolian); mixed sands with both glauconite and carbonaceous detritus, common as turbidites; and poorly winnowed nonmarine sandstones.

—Presence or absence of glauconite and carbonaceous detritus divide sands i... Available to Purchase

Published: 01 February 1976
Fig. 2 —Presence or absence of glauconite and carbonaceous detritus divide sands into four main genetic groups: marine winnowed sands; nonmarine winnowed sands (often eolian); mixed sands with both glauconite and carbonaceous detritus, common as turbidites; and poorly winnowed nonmarine
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Test for the stability of the machine‐learning algorithm with a less winnowed data set in Table 1. We selected 35 positive examples (white) of earthquakes that include earthquake signals as well as relatively strong noise signals in the surface‐wave window and 35 negative examples (black) that do not include earthquake signals but have high‐SNR due to strong noise signals in the surface‐wave window. The accuracy of the machine‐learning algorithm is 92.9% and the SNR is 78.6%, and seismograms are shown in Figure S4.

Test for the stability of the machine‐learning algorithm with a less winnow... Available to Purchase

Published: 02 January 2020
Figure 6. Test for the stability of the machine‐learning algorithm with a less winnowed data set in Table  1 . We selected 35 positive examples (white) of earthquakes that include earthquake signals as well as relatively strong noise signals in the surface‐wave window and 35 negative examples
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The SCA computed within a 1300 ms window (700–2000 ms) for the winnowed (a) baseline and (b) monitor 3 data sets. Monitor 3 amplitudes are 1.5 times larger than the baseline’s.

The SCA computed within a 1300 ms window (700–2000 ms) for the winnowed (a)... Available to Purchase

Published: 06 April 2017
Figure 5. The SCA computed within a 1300 ms window (700–2000 ms) for the winnowed (a) baseline and (b) monitor 3 data sets. Monitor 3 amplitudes are 1.5 times larger than the baseline’s.