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Keweenawan-age caliche paleosol in the lower part of the Calumet and Hecla Conglomerate, Centennial Mine, Calumet, Michigan

1985; Geological Society of America; Volume: 96; Issue: 9 Linguagem: Inglês

10.1130/0016-7606(1985)96 2.0.co;2

1943-2674

J. Kalliokoski, EDWIN J. WELCH,

Geological formations and processes

Research Article| September 01, 1985 Keweenawan-age caliche paleosol in the lower part of the Calumet and Hecla Conglomerate, Centennial Mine, Calumet, Michigan J. KALLIOKOSKI; J. KALLIOKOSKI 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Search for other works by this author on: GSW Google Scholar EDWIN J. WELCH EDWIN J. WELCH 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Search for other works by this author on: GSW Google Scholar Author and Article Information J. KALLIOKOSKI 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 EDWIN J. WELCH 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1985) 96 (9): 1188–1193. https://doi.org/10.1130/0016-7606(1985)96 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. KALLIOKOSKI, EDWIN J. WELCH; Keweenawan-age caliche paleosol in the lower part of the Calumet and Hecla Conglomerate, Centennial Mine, Calumet, Michigan. GSA Bulletin 1985;; 96 (9): 1188–1193. doi: https://doi.org/10.1130/0016-7606(1985)96 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Calumet and Hecla Conglomerate, a Keweenawan interflow sedimentary unit that is ∼1.1 b.y. in age, consists at the Centennial Mine of a felsitic conglomerate upper part and of ∼1–2 m of siltstone and shale along the base. In these fine-grained sediments, there is a complex submature caliche soil profile represented by an upward increase in calcite and corresponding changes in calcite structures. There is also caliche in conglomerate. All of this calcite predates the period of regional epidote alteration. The caliche is interpreted to have developed in slowly aggrading sediments that were deposited on a rock-floored fluvial plain and took place during the initial stages of slope reversal of the lava plain, from southerly to northerly. This kind of carbonate accumulation in sediments requires a highly seasonal, temperate or tropical climate and represents ∼15,000 yr of weathering. The corresponding Keweenawan paleolatitude has been reported to be ∼30°N. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.