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- W2999889890 abstract "Abstract The stratigraphy within the Wittenoom Formation’s Paraburdoo Member of the Hamersley Basin in Western Australia has lacked a significant and identifiable marker bed until the recent discovery of the Paraburdoo Spherule Layer (PSL). In this paper, we correlate this stratigraphy residing at the three known exposed locations of the PSL within the Hamersley Basin and use these correlations in conjunction with detailed observations and analyses to assess the type of sedimentation recorded by these alternating ‘sand’ and ‘mud’ beds. We also characterize in detail these same several meters of stratigraphy using the PSL as a distinctive marker bed and add to the existing depositional model of the Hamersley Basin. We find that (1) the strata surrounding the PSL was not deposited by sediment gravity flows, but rather long-acting deep-marine bottom current(s), (2) the rhythmicity recorded as alternating ‘sand’ and ‘mud’ beds is the result of increasing and decreasing current velocities, (3) grain size decreases while mud content increases to the east within the basin, (4) bed thinning occurs to the west within the basin, (5) microbial activity may be recorded in laminations in the finer-grained mud beds present within these strata, and (6) the diagenetic history changes across the Hamersley Basin." @default.
- W2999889890 created "2020-01-23" @default.
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- W2999889890 date "2020-03-01" @default.
- W2999889890 modified "2023-09-24" @default.
- W2999889890 title "Bottom-current depositional model and characterization of the Paraburdoo Member surrounding the Paraburdoo Spherule Layer, Hamersley Basin, Western Australia" @default.
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- W2999889890 doi "https://doi.org/10.1016/j.precamres.2020.105596" @default.
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