https://bereket-haileab.geology.sites.carleton.edu/files/original/58ddaa4f10b4b07addcba9fb857bfbf7.jpg 750987c1a79eb9c4a7e1974a2094be40 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. Thin section 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 BH250-144b Subject The topic of the resource St. Peter Sandstone Description An account of the resource Major Mineral: quartz Minor Minerals: iron oxide, calcite BH250-144b is a sample from the St. Peter Sandstone, one of the most recognizable and extensively studied sandstone units in the central United States. In Minnesota, it is both geologically significant and economically important due to its purity, extent, and physical properties. The St. Peter Sandstone is an extremely mature sandstone: Grains are very well-sorted and well-rounded, indicating prolonged transport and extensive reworking. Compositionally mature: Composed of ~99% quartz, with very few feldspar grains or lithic fragments. Grain size is typically fine to medium sand. It is often described as a supermature sandstone, reflecting multiple sedimentary recycling events and long-distance transport. Industrial Importance The St. Peter Sandstone is highly valued for its purity. Uniform grain size, rounded grain shape Major Industrial Uses: Frac Sand: The well-rounded, high-purity quartz grains make it an ideal proppant in hydraulic fracturing operations. Glass Manufacturing: Its high silica content (~99.5%) makes it suitable for producing optical, container, and other high-quality glass products. Cementation Characteristics One of the defining features of the St. Peter Sandstone is its weak to moderate cementation, which enhances its suitability for industrial processing. In most outcrops and cores, it is loosely cemented or even friable, often crumbling easily. Exposures often feel soft and can be scratched or broken apart by hand. Some zones are nearly uncemented, with grains bound only minimally. Cement Types (when present): Silica (quartz overgrowths): Most common, forming thin rims on grains. Iron oxides produce reddish or yellowish stains in weathered zones. Calcite, found locally, particularly in deeper subsurface intervals. For more information see, BH250 – Sandstone Overview with Petrographic Notes Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Location: Warsaw Township, Minnesota, USA GPS Coordinates: 44°22'37.70"N, 92°55'59.25"W Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample 144b. Housed at Carleton College in Minnesota. Type The nature or genre of the resource Thin section Creator An entity primarily responsible for making the resource Bereket Haileab Relation A related resource <iframe width="100%" height="600" style="border: 0;" src="https://carleton.maps.arcgis.com/apps/instant/media/index.html?appid=14729386b60348e589405c95ccdae68d" frameborder="0" allowfullscreen="allowfullscreen">iFrames are not supported on this page.</iframe><br />View on ArcGIS Online <a href="https://carleton.maps.arcgis.com/home/item.html?id=14729386b60348e589405c95ccdae68d">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1XwdUbQQQoZhlzI8J6WS1hUntS6Ckqagk/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1sipAP3gC3T0abqUlmgWX4AnPOd6-4b2H/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1kc_Da5GADJzyu9eM_u9d8PqEdVAGLTDM/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1ecWOcinmHp1XBQtHZqd_G-y15SA6e4GE/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1LdOMeDrVdBlwWRQydOoIeXhEWkxXS9Co/preview" allow="autoplay"></iframe> Compositionally mature Frac sand source Glass sand High-purity quartz sand Hydraulic fracturing sand Iron oxide staining Proppant sandstone Quartz-rich Sandstone St. Peter Sandstone Supermature sandstone Texturally mature Wangs Corner Well-rounded quartz grains Well-sorted sandstone