Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Pennsylvanian paleokarst and cave fills from northern Illinois, USA; a window into Late Carboniferous environments and landscapes

Roy E. Plotnick, Fabien Kenig, Andrew C. Scott, Ian J. Glasspool, Cortland F. Eble and William J. Lang
Pennsylvanian paleokarst and cave fills from northern Illinois, USA; a window into Late Carboniferous environments and landscapes
Palaios (October 2009) 24 (10): 627-637

Abstract

A new fault-associated paleokarst and cave fill has been discovered in north-central Illinois, emplaced in Ordovician limestones. The paleokarst preserves many original solution features, such as oriented grooves, pendants, and half tubes. Many of the ancient cave passages have rounded bottoms and flat roofs. Together these suggest that the original elliptical, phreatic cave passages grew upward by paragenesis, in which the floor of the cave is protected from dissolution by the presence of sediment, while the ceiling of the cave grows upward by dissolution. The fill is dated as Moscovian (Middle Pennsylvanian) based on palynological data and can be correlated with the Tradewater Formation. The fills are composed of a fining-upward sequence of relatively unindurated clastic sediments that contain well-preserved plant fossils, most notably voltzialean conifer and cordaite remains, representative of vegetation living in well-drained areas. Many of the macrofossils are fragmentary but charcoalified and, along with the megaspores, are uncompressed and preserve exceptional morphological and anatomical data. The presence of abundant charcoal in the fills, as well as diagnostic polycyclic aromatic hydrocarbons, indicates significant wildfire activity in this area during this interval.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 24
Serial Issue: 10
Title: Pennsylvanian paleokarst and cave fills from northern Illinois, USA; a window into Late Carboniferous environments and landscapes
Affiliation: University of Illinois at Chicago, Department of Earth and Environmental Sciences, Chicago, IL, United States
Pages: 627-637
Published: 20091001
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 74
Accession Number: 2009-088691
Categories: Paleobotany
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., geol. sketch map
N41°25'00" - N41°42'00", W88°37'60" - W88°16'60"
Secondary Affiliation: Royal Holloway University of London, GBR, United KingdomField Museum of Natural History, USA, United StatesUniversity of Kentucky, USA, United StatesStrataPower, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 200948
Close Modal

or Create an Account

Close Modal
Close Modal