https://bereket-haileab.geology.sites.carleton.edu/files/original/53f93a7df35995dfb3c6ed1c38ac2d96.jpg 9c39358c24fc3a898d9a2c32b841cf74 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 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 BH250-79 Subject The topic of the resource Marble Description An account of the resource Major Mineral: dolomite Mineralogy Comments: dolomite has anomalous biaxial figures Compared to BH250-78, this marble originated from a very clean carbonate protolith, lacking siliceous or other non-carbonate materials. The carbonate minerals display well-developed twin lamellae, which can be used to distinguish between calcite and dolomite by locating the c-axis through relief changes and observing whether the c-axis forms an acute or obtuse angle with the twin lamellae. Additionally, many carbonate crystals are oriented favorably for obtaining clear interference figures under polarized light. Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample 79. Housed at Carleton College in Minnesota. Type The nature or genre of the resource Thin section Relation A related resource <iframe width="100%" height="600" style="border: 0;" src="https://carleton.maps.arcgis.com/apps/instant/media/index.html?appid=b1295b95cd6b4d8e9f6b8ff6d7f4b6ec" 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=b1295b95cd6b4d8e9f6b8ff6d7f4b6ec">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1MiYSzUYPKaIimpDH9lQsLh1cnn0IAwbE/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1wzdp6GT90z3YetUSYl4SkGuF1rBkzo2I/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1pK8cHz7AqB9dVhmnnxwhXFQdgWiTq7CI/preview" allow="autoplay"></iframe> Creator An entity primarily responsible for making the resource Bereket Haileab C-axis orientation Calcite carbonate Carbonate Minerals Clean carbonate protolith Dolomite Interference figures marble metamorphic relief Twin Lamellae