Modeling the Influence of Taphonomic Destruction, Reworking, and Burial on Time-Averaging in Fossil Accumulations

@inproceedings{Olszewski2004ModelingTI,
  title={Modeling the Influence of Taphonomic Destruction, Reworking, and Burial on Time-Averaging in Fossil Accumulations},
  author={Thomas D. Olszewski},
  year={2004},
  url={https://api.semanticscholar.org/CorpusID:130117819}
}
Abstract A mathematical/computer model was constructed to explore the effects of changes in rates of taphonomic loss, sediment reworking, and burial on time-averaging in fossil deposits. Using a Monte Carlo algorithm, the main controlling variables were thickness of the taphonomically active zone (TAZ; the interval where shells are likely to be destroyed), depth of final burial (DFB; below which shells can no longer be reworked into the TAZ), and burial rate. Output included both the decay… 
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37 References

Time and taphonomy: quantitative estimates of time-averaging and stratigraphic disorder in a shallow marine habitat

We examined the radiocarbon age, taphonomic condition and stratigraphic position of shells of the venerid bivalve Chione spp. from the tidal flats of Bahia la Choya, Sonora, Mexico. Shells in Bahia…

Time-averaging in the marine fossil record: overview of strategies and uncertainties

High-resolution estimates of temporal mixing within shell beds: the evils and virtues of time-averaging

This study quantifies the fine structure of time-averaging by using large samples of dated shells collected from within individual strata, finding that shell beds can provide a complete, high-resolution record, and thus offer exceptional insights into the environmental and climatic changes of the last 40 thousand years.

Is burial velocity a master parameter for bioturbation

Time-averaging and postmortem skeletal survival in benthic fossil assemblages: quantitative comparisons among Holocene environments

We used radiocarbon ages on dead Holocene shells of the venerid bivalve Chione spp. to investigate how time-averaging and taphonomy in shallow marine benthic assemblages vary with sedimentary and…

Early Diagenesis: A Theoretical Approach

Diagenesis refers to changes taking place in sediments after deposition. In a theoretical treatment of early diagenesis, Robert Berner shows how a rigorous development of the mathematical modeling of…

Time-averaging, taphonomy, and their impact on paleocommunity reconstruction: Death assemblages in Texas bays

The death assemblages in upper Copano Bay and upper Laguna Madre, Texas, were compared with the living communities as sampled over a two-year period in order to determine how taphonomy and…

The rate of taphonomic loss in modern benthic habitats: How much of the potentially preservable community is preserved?

New model for the emplacement, bioturbation, and preservation of fine-scaled sedimentary strata

We present a new quantitative model for the formation and preservation of sedimentary fabric based on interacting sedimentation and bioturbation. The model is one-dimensional and is forced by…

Taking advantage of time-averaging

Abstract One of the major obstacles in dealing with any form of data derived from fossils is the effects of time-averaging, which are the result of mixing the remains of organisms that did not live…