https://bereket-haileab.geology.sites.carleton.edu/files/original/760dc50aa171f1b7216930e6c2095d63.jpg 44c83b3f700c5241a82bc440c2026d75 https://bereket-haileab.geology.sites.carleton.edu/files/original/58b358c783e01994b774ee519b2549cc.jpg 52c22b2830b9902c49b2cb0f0b875ac0 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sedimentary Rocks Subject The topic of the resource This collection includes sandstones, limestones, breccias, conglomerates, dolostones, shales, oolites, and BIF. Creator An entity primarily responsible for making the resource Bereket Haileab Source A related resource from which the described resource is derived Housed in Anderson Hall, Carleton College. Format The file format, physical medium, or dimensions of the resource Thin sections, thin section scans, hand samples, hand sample images, photomicrographs. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource BH250-128g Subject The topic of the resource Glen Wood Shale Description An account of the resource Glen Wood Shale BH250-128g is a sample of the Glenwood Formation collected in the Sogn Valley along Highway 14 in southeastern Minnesota. At this locality, the formation is concealed beneath soil and vegetation, so it is necessary to dig into the roadside ditch to expose the outcrop. The rock is a soft, fissile, greenish-gray shale composed primarily of clay minerals with minor silt-sized quartz and other detrital grains. It was deposited during the Middle Ordovician in a quiet, shallow-marine environment as rising sea level flooded the sandy seafloor represented by the underlying St. Peter Sandstone. The Glenwood Formation is overlain by carbonate rocks of the Platteville Formation. Although relatively thin, the Glenwood Shale is environmentally and hydrogeologically important. Its low permeability restricts groundwater movement between the permeable St. Peter Sandstone and the overlying carbonate rocks. Water commonly moves laterally along the sandstone–shale contact, producing seeps, springs, and wet zones where the contact intersects the land surface. Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Sogn Valley, Goodhue County Creator An entity primarily responsible for making the resource Bereket Haileab Relation A related resource <iframe width="100%" height="480" src="https://drive.google.com/file/d/1LeA00LKFCGjDh2L5AWuxC55ElsWp1IuQ/preview" allow="autoplay"></iframe><iframe width="100%" height="480" src="https://drive.google.com/file/d/11mDQ_kogiqtayqkaWFMyFSEcxV1wr19l/preview" allow="autoplay"></iframe><iframe width="100%" height="480" src="https://drive.google.com/file/d/1HeQnhf-uAd-lnuOvB428BNRDDjqhNgvE/preview" allow="autoplay"></iframe> Glenwood Formation Glenwood Shale Middle Ordovician Platteville Formation Sedimentary rock shale southeastern Minnesota St. Peter Sandstone