Late Ordovician-Early Silurian chitinozoans from north-eastern and western Illinois, USA
Review of Palaeobotany and Palynology
By: A. Butcher, Donald G. Mikulic, and Joanne Kluessendorf
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Abstract
Samples of uppermost Ordovician and Silurian strata from two cores from north-eastern and western Illinois were processed for chitinozoans. Due to apparent sea-floor oxidation or palaeoenvironmental constraints, very few samples yielded specimens, but those that did allow tentative correlation with established biostratigraphical zonations for the Chitinozoa. Samples from the Wilhelmi Formation of core DH76-21 in north-eastern Illinois yielded Spinachitina fragilis, a typically earliest Silurian taxon. A sample from the Maquoketa Group strata of core Principia #4, western Illinois, yielded a monospecific assemblage of Conochitina elegans, which is suggestive of a late Ordovician age. Higher in this core, a sample from the upper strata of the Bowling Green Dolomite yielded an assemblage indicating a late Rhuddanian to Aeronian age, including Angochitina hansonica, previously only described from strata in Nevada, and one new species, Fungochitina illinoisensis. ?? 2009 Elsevier B.V. All rights reserved.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Late Ordovician-Early Silurian chitinozoans from north-eastern and western Illinois, USA |
| Series title | Review of Palaeobotany and Palynology |
| DOI | 10.1016/j.revpalbo.2009.11.002 |
| Volume | 159 |
| Issue | 1-2 |
| Year Published | 2010 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Review of Palaeobotany and Palynology |
| First page | 81 |
| Last page | 93 |
| Google Analytic Metrics | Metrics page |