Chemistry and mineralogy of Precambrian paleosols in northern Michigan
Document Type
Article
Publication Date
1-1-1975
Abstract
Paleosol profiles can be recognized on a basement terrain of granodiorite, peridotite, and diabase that underlie the upper Keweenawan (?) Jacobsville sandstone. The main characteristics of the granodiorite and peridotite profiles are a substantial loss in SiO2, Al2O3, and alkaline earths; a smaller loss in Fe2O3 and NiO; the concentration of dolomite and quartz in paleocaliche horizons; and the strong pigmentation of some of the primary minerals at the lower fringe of weathering. The granodiorite paleosol consists of a mixture of secondary and primary minerals: sericite, chlorite, vermiculite, biotite, muscovite, K-feldspar, dolomite, quartz, hematite, and rutile. The paleosol on peridotite contains chlorite, vermiculite, dolomite, quartz, hematite, and talc. The paleosol profiles resemble present-day ones developed under semi-arid to arid conditions. © 1975 Geological Society of America.
Publication Title
Bulletin of the Geological Society of America
Recommended Citation
Kalliokoski, J.
(1975).
Chemistry and mineralogy of Precambrian paleosols in northern Michigan.
Bulletin of the Geological Society of America,
86(3), 371-376.
http://doi.org/10.1130/0016-7606(1975)86<371:CAMOPP>2.0.CO;2
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/12277