Banded iron formation (Negaunee Iron-Formation, Paleoprote ...
Banded iron formation (Negaunee Iron-Formation, Paleoprote ... Apr 05, 2017 · Banded iron formation from the Precambrian of Michigan, USA. (~11.9 cm across at its widest) Banded iron formations, or BIFs, are unusual, dense sedimentary rocks consisting of alternating layers of iron-rich oxides and iron-rich silicates. Most BIFs are Proterozoic in age (although some are Jasper Hill (Jasper Knob), Ishpeming, Marquette Co ... Jasper Hill (Jasper Knob), Ishpeming, Marquette Co., Michigan, USA : A bald-topped hill within the city of Ishpeming composed entirely of jaspilite, or more properly, banded hematite and jasper. To visit the hill, follow the stone steps through the wall and woods Hematite: A primary ore of iron and a pigment mineral Banded Iron Formation: Close-up of a banded iron formation. In this specimen, bands of hematite (silver) alternate with bands of jasper (red). The rock produced where these formations are mined is often called "taconite." This photo spans an area of rock about one foot (30 centimeters) wide.
Jaspilite is a Banded Iron Formation. It is also known as B anded Ironstone and is a distinctive unit of sedimentary rock that are almost always of Precambrian age. A typical Jaspilite consists of repeated, thin layers, of silver to black iron oxides, either Magnetite (Fe 3 O 4 ) or Hematite (Fe 2 O 3 ), alternating with bands of iron-poor Banded Iron Formation "BIF" | Geology Page Banded iron formations (BIFs) are chemically precipitated sedimentary rocks. They are composed of alternating thin (millimeter to centimeter scale) red, yellow, or cream colored layers of chert or jasper and black to dark gray iron oxides (predominantly magnetite and hematite), and/or iron … TABLE DR1. PRECAMBRIAN SUPERIOR-TYPE BANDED IRON ... *Included here within Superior-type BIF and Rapitan-type banded iron formation are granular iron formation and non-banded ironstone, respectively. Algoma-type iron formation, which occurs in or is closely associated with volumetrically abundant metavolcanic rocks (1, 2, 3), is excluded from the compilation because this generally Geologic units in Marquette county, Michigan
Summer #2 | EARTH Outreach - University of Michigan Today the campers went to Houghton, MI for a tour of the Quincey Copper Mine and to explore the A.E. Seaman Mineral Museum where the University of Michigan mineral collection is displayed. While in the Marquette region, the students went to Jasper Knob to see banded iron formations – the backbone of the iron industry in Michigan. Banded iron formation - Simple English Wikipedia, the free ... Banded iron formations (or BIFs) are a distinctive type of rock often found in (Precambrian) sedimentary rocks.. They consist of repeated thin layers of iron oxides, either magnetite (Fe 3 O 4) or hematite (Fe 2 O 3), alternating with bands of iron-poor shale and chert.. Some of the oldest known rock formations, formed over 3,700 million years ago (mya), include banded iron layers. Banded iron formation from the Precambrian of Michigan ... Banded iron formation, Soudan iron-formation member of the Ely Greenstone, a formation of Archean metamorphized pillow basalt found near the city of Ely, MN. It dates to app Ba, making it among the oldest rocks in the world Banded iron formation - Soudan iron-formation member of the Ely Greenstone | Flickr - Photo Sharing! Banded Iron Formation | #Geology #GeologyPage Locality ...
Menominee Group; Negaunee Iron-formation (Early Proterozoic) at surface, covers 2 % of this area. Highly metamorphosed banded iron-formation. Principal iron-formation in Marquette trough and nearby areas. Includes abundant metadiabase sills. A Brief History of Mining in Michigan’s Marquette and ... The iron formations are associated with slates and quartzites that have been metamorphosed and folded. An unknown quantity of iron formation has been removed by glacial activity leaving the formations exposed at the surface in many areas. Jasper Knob near Ishpeming provides a good look at the exposed banded iron formation called Jaspilite. Banded Iron Formation and Destruction Banded Iron Formation and Destruction Iron formation – Stratigraphic Unit composed of 15-85% Fe Ironstones –Phanerozoic iron-rich rocks BIF – iron formations with alternating bands of chert low alumina content - <1% GIF – granular iron formations terrigenous content with ooliths Alternating bands of Fe rich and poor layers Chert often found as Fe poor layers jsjgeology.net
TABLE DR1. PRECAMBRIAN SUPERIOR-TYPE BANDED IRON ...
