1-10 OF 10 RESULTS FOR

Pewamo Formation

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Series: GSA Special Papers
Published: 10 May 2018
DOI: 10.1130/2018.2531(15)
EISBN: 9780813795317
... ABSTRACT Pennsylvanian red beds are the youngest known rocks in the Michigan Basin. Two new formation-level units, the Pewamo Formation and the Haybridge strata, have recently been described. The Pewamo Formation, composed of Pennsylvanian red sandstones and minor laminated mudstones, is known...
FIGURES | View All (4)
Journal Article
Published: 01 July 2011
Journal of Sedimentary Research (2011) 81 (7): 459-478.
..., field, and laboratory observations to document these strata, which we propose as one new formation, the Pewamo Formation. The Pewamo Formation consists of eolian quartz sandstones with red coloration due to iron-oxide diagenesis, and interbedded interdune lacustrine siliciclastic mudstones. We also...
FIGURES | View All (13)
Image
Photomicrographs of <b>Pewamo</b> <b>Formation</b> from <b>Pewamo</b> 1-08 core and outcrops, Io...
Published: 01 July 2011
Figure 6 Photomicrographs of Pewamo Formation from Pewamo 1-08 core and outcrops, Ionia County, Michigan. A) Quartz sandstone with bimodal grain size distribution; 50 feet (15.2 m) depth; plane transmitted light. B) Quartz sandstone with bimodal grain size distribution; surface sample
Image
<b>Pewamo</b> <b>Formation</b> (A to J) and Saginaw <b>Formation</b> (K to N) unpolished slabs f...
Published: 01 July 2011
Figure 5 Pewamo Formation (A to J) and Saginaw Formation (K to N) unpolished slabs from Pewamo 1-08 core, Ionia County, Michigan. A) Pin-stripe cross-bedding in red sandstone. B) Reactivation surface (arrows) in cross-bedded red sandstone. C) Vertical dark root features in sandstone. D
Image
<b>Pewamo</b> <b>Formation</b> in building stones, abandoned quarries, and outcrop.  A)  ...
Published: 01 July 2011
Figure 2 Pewamo Formation in building stones, abandoned quarries, and outcrop. A) Blanchard House, built by original quarry owner in 1886, in Ionia, Michigan. B) Ionia County Courthouse, Ionia, Michigan, built 1883 to 1886. C) Decorative facing stone in Shepherd, Michigan. D) Low-angle
Image
Photographs of siliciclastic mudstones in the <b>Pewamo</b> <b>Formation</b>; all oriente...
Published: 01 July 2011
Figure 7 Photographs of siliciclastic mudstones in the Pewamo Formation; all oriented up. A to B, gray mudstone. C to D, pink mudstone. A) Large-format thin-section view of laminations and mudcracks. Blue is epoxy; white is space where epoxy was plucked during thin-section preparation. B
Image
Photomicrographs of palynomorphs extracted from gray mudstone of <b>Pewamo</b> For...
Published: 01 July 2011
Figure 8 Photomicrographs of palynomorphs extracted from gray mudstone of Pewamo Formation, 78 feet (23.8 m) depth, Pewamo 1-08 core. A) Lycospora pellucida . B) Granulatisporites granularis . C) Suspect Calamospora hartungiana . Photomicrographs and identification by Mohamed K. Zobaa.
Image
Working model for a revised stratigraphic column for the late Paleozoic to ...
Published: 01 July 2011
Figure 13 Working model for a revised stratigraphic column for the late Paleozoic to Cenozoic stratigraphy of the Michigan Basin. Actual thicknesses are not represented here. Question marks along the contacts amongst the Grand River Formation, the Haybridge strata, and the Pewamo Formation denote
Image
Current, but suspect, official descriptions of shallow rocks of the central...
Published: 01 July 2011
Figure 1 Current, but suspect, official descriptions of shallow rocks of the central portion of the Michigan Basin. A) Bedrock geologic map of the Lower Peninsula showing strata according to time periods. Note that the Pewamo core location is marked by a white X and the Haybridge mine dumps
Series: GSA Special Papers
Published: 10 May 2018
DOI: 10.1130/2018.2531(01)
EISBN: 9780813795317
... Basin (statistics from http://www.dleg.state.mi.us/mpsc/gas/storage.htm ; accessed 22 June 2017). Chapter 15. “Pennsylvanian Pewamo Formation and Haybridge strata of central Michigan: The youngest rocks of the Michigan Basin?” by Kathleen C. Benison This study evaluates some of the Pennsylvanian...
FIGURES