The Winneshiek biota: exceptionally well-preserved fossils in a Middle Ordovician impact crater

@article{Briggs2018TheWB,
  title={The Winneshiek biota: exceptionally well-preserved fossils in a Middle Ordovician impact crater},
  author={Derek E. G. Briggs and Huaibao P. Liu and Robert Murray McKay and Brian J. Witzke},
  journal={Journal of the Geological Society},
  year={2018},
  volume={175},
  pages={865 - 874}
}
The Winneshiek Shale (Middle Ordovician, Darriwilian) was deposited in a meteorite crater, the Decorah impact structure, in NE Iowa. This crater is 5.6 km in diameter and penetrates Cambrian and Ordovician cratonic strata. It was probably situated close to land in an embayment connected to the epicontinental sea; typical shelly marine taxa are absent. The Konservat-Lagerstätte within the Winneshiek Shale is important because it represents an interval when exceptional preservation is rare. The… 

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References

SHOWING 1-10 OF 81 REFERENCES

Bivalved arthropods from the Middle Ordovician Winneshiek Lagerstätte, Iowa, USA

Abstract. The Middle Ordovician (Darriwilian) Winneshiek Lagerstätte of northeast Iowa is preserved in a meteorite crater. Besides conodonts, the fossils are dominated by arthropods, particularly

TAPHONOMY AND BIOLOGICAL AFFINITY OF THREE-DIMENSIONALLY PHOSPHATIZED BROMALITES FROM THE MIDDLE ORDOVICIAN WINNESHIEK LAGERSTÄTTE, NORTHEASTERN IOWA, USA

Abstract The Winneshiek Lagerstätte occurs within an Ordovician meteorite impact structure beneath part of the city of Decorah, Iowa. The Lagerstätte has yielded an atypical marine fauna including

The Winneshiek Lagersttte,Iowa,USA and Its Depositional Environments

Fossil Lagersttten are deposits containing abundant and/or exceptionally preserved fossils,often including soft-bodied tissue.Of these,Konservat-Lagersttten are especially important because they

Survival of Burgess Shale-type animals in a Middle Ordovician deep-water setting

Exceptional preservation of non-biomineralized arthropods, sponges and vermiform taxa occurs in the Darriwilian (Middle Ordovician) Llanfallteg Formation of South Wales, UK. The assemblage contains

Exceptionally preserved Late Ordovician biotas from Manitoba, Canada

There are few body fossil biotas known from early Paleozoic accretionary shorelines, and very few examples of Ordovician soft-bodied assemblages. This study documents two recently discovered biotas

Age calibration of the Lower Ordovician Fezouata Lagerstätte, Morocco

The Fezouata Lagerstatte, discovered in the Lower Ordovician rocks of Morocco, is a Konservat-Lagerstatte of prime scientific importance. It provides access not only to the ‘shelly’ (skeletonized)

The late Ordovician Soom Shale Lagerstätte: an extraordinary post-glacial fossil and sedimentary record

Fossils of the Late Ordovician Soom Shale Lagerstätte are characterized by exceptional preservation of their soft tissues in clay minerals. The low-diversity community lived in an unusual cold-water

Fauna and ecology of the holothurian bed, Llandrindod, Wales, UK (Darriwilian, Middle Ordovician), and the oldest articulated holothurian

Unlike Cambrian Lagerstätten, Ordovician exceptionally preserved faunas generally differ substantially from each other in taxonomic composition, suggesting a much greater diversity of

The Walcott-Rust Quarry: Middle Ordovician trilobite Konservat-Lagerstätten

The Walcott-Rust Quarry, at Trenton Falls, New York, has yielded a large number of well-preserved, fully articulated fossils from the lower third of the Middle Ordovician Rust Formation, Trenton
...