https://bereket-haileab.geology.sites.carleton.edu/files/original/e84de6fdb51bb116a1bec759fe50e30d.jpg c097fdac009248a9d3bc688630e40fbd 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 Metamorphic Rocks Subject The topic of the resource This collection includes slates, phyllites, schists, gneisses, eclogites, marbles, quartzites, skarns, granulites, and mylonites. 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, chemical analyses (major elements, trace elements and REE analyses for selected samples). Thin section and hand sample 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 BH250-177 Subject The topic of the resource Black Vishnu Schist Description An account of the resource Major Minerals: hornblende, quartz The Vishnu Schist is one of the oldest rock units in the Grand Canyon, forming part of the Vishnu Basement Rocks exposed in the Inner Gorge. The term "Black Vishnu Schist" refers specifically to the darker, more mafic-rich variants of the Vishnu Schist. These rocks are Paleoproterozoic in age (~1.75 billion years) and are derived from metamorphism of volcanic protoliths as can be seen from the mineral assemblage. Metamorphism reached the amphibolite facies, producing a rock that is strongly foliated and lineated, with well-developed schistosity. The Black Vishnu Schist is in direct contact with the overlying Paleozoic sedimentary rocks (Tapeats Sandstone) across the famous Great Unconformity, providing a striking example of this profound geologic boundary in North America. I have taken several photos of this nonconformity, which are available on this website. 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: Lower Section, Grand Canyon, Arizona, USA Nearby Geographic Feature: Grand Canyon Date A point or period of time associated with an event in the lifecycle of the resource August 2015 Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample BH250-177. Housed at Carleton College in Minnesota. Type The nature or genre of the resource Thin section and hand sample Relation A related resource <iframe width="100%" height="600" style="border: 0;" src="https://carleton.maps.arcgis.com/apps/instant/media/index.html?appid=d078b4a34e154008986da45784b784d4" 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=d078b4a34e154008986da45784b784d4">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1C3aLBDHbPP3YlfwA65as4faP5dl00RYO/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1I5hFchXiRPTjkLhEUVdBUeb7s3HxenkF/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1afVJb4dOITyPmhL7wdrnZ337v3m6ZrbF/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1WRZE5GBxs4WDLbemhj2IJLlcz-hdQv4r/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1bFPt09K2kzSyBmoVEBH8rt_rS2RbXrIr/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1OS_URfW7RLY0l-zAeGB9tU8hCXII0lyO/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1EkuGC53BI_3rQg3K-Zzh4avKf2NH8yIv/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1UiTzzvx4a8HIdmjbX0rS59E11qZGoZrZ/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1RTZt8ZnRQxugdysmRIZ9FWigvaO3wrVA/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/18tFXsoHS2eM_SC7RX4gbjKrxDcziRGw8/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1xEFT-cf85Bh2RW_7hm54kNb13DBmtG-C/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1Swbh35NqMThtf6u654zIL1E242Y2rFBa/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1aB3oxoscLqLUZRI9GVMTjRYPMpQW824p/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/179Ts4dPPn3IqaLCQIwcDe_NRbtlSLPtQ/preview" allow="autoplay"></iframe> Creator An entity primarily responsible for making the resource Bereket Haileab Contributor An entity responsible for making contributions to the resource Bereket Haileab Amphibolite Facies Black Vishnu Schist Foliation Great Unconformity Hornblende Hornblende Quartz Schist Mafic Metamorphism metamorphic nonconformity schist Schistosity Tapeats Sandstone Vishnu Schist Volcanic Protoliths