2017
DOI: 10.1017/pab.2016.52
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Paleoecological and stratigraphic controls on eurypterid Lagerstätten: a model for preservation in the mid-Paleozoic

Abstract: Recent studies of eurypterid paleoecology suggest that formation of eurypterid Lagerstätten in the mid-Paleozoic of Laurentia was controlled by the presence of an ecological–taphonomic window that recurred predictably in nearshore, marginal environments during transgressions. We tested this hypothesis by performing a high-resolution taxonomic, environmental, and stratigraphic survey and quantitative analysis of all Silurian–Lower Devonian eurypterid-bearing intervals in the Appalachian basin, the most prolific… Show more

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Cited by 8 publications
(5 citation statements)
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“…Once in this setting, burial of the arthropod carcasses in fine-grained clays, and the onset of hypersaline conditions in the water column or subsurface, would have been inimical to growth of decay bacteria and conducive to long-term preservation (Seki and Taga, 1963; McMahon et al, 2016). The occurrence of Soligorskopterus n. gen. in what appear to be semiregular intervals in the Soligorsk Formation could also reflect a broader sequence stratigraphic control on preservation (see Vrazo et al, 2017), and it is clear that further sedimentological and stratigraphic work is needed to fully understand the environmental factors that facilitated eurypterid preservation in this evaporitic lithofacies.…”
Section: Paleoecology Of Soligorskopterus N Genmentioning
confidence: 99%
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“…Once in this setting, burial of the arthropod carcasses in fine-grained clays, and the onset of hypersaline conditions in the water column or subsurface, would have been inimical to growth of decay bacteria and conducive to long-term preservation (Seki and Taga, 1963; McMahon et al, 2016). The occurrence of Soligorskopterus n. gen. in what appear to be semiregular intervals in the Soligorsk Formation could also reflect a broader sequence stratigraphic control on preservation (see Vrazo et al, 2017), and it is clear that further sedimentological and stratigraphic work is needed to fully understand the environmental factors that facilitated eurypterid preservation in this evaporitic lithofacies.…”
Section: Paleoecology Of Soligorskopterus N Genmentioning
confidence: 99%
“…The nektonic and nektobenthic Eurypterina were particularly hard hit by the biotic crisis, dwindling exponentially in diversity from the latest Silurian through to the Middle Devonian. The survivors were relegated to the margins of eurypterid niche space and invaded continental freshwater ecosystems (Lamsdell and Braddy, 2010; Lamsdell and Selden, 2017), although the exact timing of this transition is still uncertain (Vrazo et al, 2017).…”
Section: Eurypterid Paleogeography and Patterns Of Extinctionmentioning
confidence: 99%
“…The lack of evidence of mass strandings, which frequently affect extant porpitids, suggests that the disc-shaped organisms were rare in the depositional environment. Their taphonomic pathway may have been promoted by sea-level transgression events as inferred for the eurypterids (Vrazo et al, 2016(Vrazo et al, , 2017.…”
Section: Taphonomymentioning
confidence: 98%
“…It crops out over 300 km from southern Ontario to the Herkimer County region of New York State (Edwards et al, 2004). During the late Silurian, massive evaporite deposits formed in the center of the basin due to the low paleolatitude, warm arid climate, and reduced connection to the open ocean (Vrazo et al, 2016(Vrazo et al, , 2017. The Bertie Group was deposited in a near-shore ramp environment separate from these massive evaporite deposits and consists of calcareous shales and chemically precipitated dolomites (waterlimes) that originated in the subtidal and intertidal zone of a shallow lagoonal setting (Burrow and Rudkin, 2014;Vrazo et al, 2017).…”
Section: Depositional Environmentmentioning
confidence: 99%
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