Skip to Main Content
Skip Nav Destination

Evaporite facies of the Michigan Basin

William B. Harrison and Peter J. Voice
Evaporite facies of the Michigan Basin (in Paleozoic stratigraphy and resources of the Michigan Basin, G. Michael Grammer (editor), William B. Harrison (editor) and David A. Barnes (editor))
Special Paper - Geological Society of America (2018) 531: 197-216


The Michigan Basin is one of the world's important sedimentary basins that contains significant quantities of evaporites. Here, evaporites are found in deposits of Ordovician through Mississippian age rocks; however, most of the thick evaporite accumulations occur in Silurian and Devonian intervals. Halite is most significant in the Silurian Salina Group, with a maximum aggregate thickness of halite exceeding 650 m (2150 ft). During the earliest evaporite deposition in the Salina Group (A-1 Evaporite), sylvite was widely deposited in the north-central portion of the basin within the upper 91.4 m (300 ft) of the formation. Devonian salt is also present in the north-central portion of the basin in the Horner Member of the Lucas Formation, where maximum aggregate net thickness of halite reaches 125 m (410 ft). Recrystallization of much of the halite obscures the primary depositional crystal geometry; however, some well-preserved beds do show crystal growth that is interpreted as bottom-growth chevrons, which likely suggest shallow-water deposition. Throughout the rest of the Michigan Basin, in both space and time, the evaporite phase deposited is CaSO4. In the shallowest portions of the Mississippian Michigan Formation, the sulfate mineral phase is gypsum; everywhere else in the basin, all the evaporitic sulfate deposits are anhydrite. Although the dehydration of the gypsum to anhydrite has slightly altered the original depositional morphology, some primary growth geometry is still evident. Subtidal and sabkha morphologies can be documented in all the anhydrite/gypsum deposits of the Michigan Basin. Based on historic production, evaporite minerals have added an estimated

ISSN: 0072-1077
EISSN: 2331-219X
Serial Title: Special Paper - Geological Society of America
Serial Volume: 531
Title: Evaporite facies of the Michigan Basin
Title: Paleozoic stratigraphy and resources of the Michigan Basin
Author(s): Harrison, William B., IIIVoice, Peter J.
Author(s): Grammer, G. Michaeleditor
Author(s): Harrison, William B., IIIeditor
Author(s): Barnes, David A.editor
Affiliation: Western Michigan University, Geosciences Department and Michigan Geological Survey, Kalamazoo, MI, United States
Affiliation: Oklahoma State Univeristy, Stillwater, OK, United States
Pages: 197-216
Published: 2018
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 9780813725314
References: 50
Accession Number: 2018-088937
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch maps
N41°45'00" - N48°25'00", W90°15'00" - W82°30'00"
Secondary Affiliation: Western Michigan University,
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 201848
Close Modal

or Create an Account

Close Modal
Close Modal