https://bereket-haileab.geology.sites.carleton.edu/files/original/c82af04d2827c0d768f42fa6c30f58db.jpg cbfb6df9678bcabe520c805815795d2d 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 BH250-30b Subject The topic of the resource Kyanite Schist Description An account of the resource BH250-30 and BH250-30b – Kyanite Schist (BH250-30b: Kyanite Schist near San Diego, California) Major Minerals: kyanite, staurolite, biotite, chlorite, muscovite, plagioclase, orthoclase, tourmaline, quartz Minor Mineral: zircon Mineralogy Comments: The rock contains massive, bladed kyanite crystals—many reaching several millimeters in length—set within a fine- to medium-grained foliated matrix of mica, feldspar, and quartz. Staurolite is commonly intergrown with kyanite and mica, while tourmaline occurs as prismatic, pleochroic grains. The thin section of BH250-30b contains the highest concentration of zircon observed among the BH250 samples. Many zircons display distinct pleochroic halos on chlorites and biotite, caused by radiation damage to surrounding minerals during zircon decay—a useful petrographic indicator of radioactive mineral inclusions. Biotite is well-developed, with several grains cut perpendicular to the c-axis, allowing for clear observation of interference figures under conoscopic examination. Muscovite and chlorite are commonly aligned along the foliation, contributing to the rock’s schistose texture. The mineral assemblage reflects a high-pressure, low- to moderate-temperature metamorphic environment, consistent with the stability field of kyanite and staurolite, and indicative of a pelitic protolith. Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant San Diego, California, USA Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample 30b. 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=bc787664f38e4b8ebd505de05b951ed9" 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=bc787664f38e4b8ebd505de05b951ed9">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1ZA5_4ECedGZhShli1yVnwLfvwSiijPFh/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1ACoXLVshAIPKSUwPbqCDfuVB7dqitE8V/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1cTwNQ_eAT1IjR9qVDTN-CBpoUFSGcTqx/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1vgqQfnBn1Mwiq9Oh0tqNzF8HTI7kAFXV/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1vzQf2RroLcT9uhL86nSqjZJl8VmXePns/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1XYNERrd8s8KaFlQWj-uLd1LOusvwbf0o/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/19t_Tjx8PFJDIeydNUZ1BHgYcmYd7cI0p/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1Giq8FAwCr_k8ZIUT38fkX7F5DlEGS8XU/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1UC6e2esnts1Vde38cffEeUiRnnthWFdH/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1_LyoWCFv5Bdqgi_F8NbJZExAqEaI3z3S/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1tX1ZNw28edtxUnJqKaPay7mduFzYYV-_/preview" allow="autoplay"></iframe> <iframe width="100%" height="480" src="https://drive.google.com/file/d/1smObTYCBvxXow9W6C9BfxGcBRIFVkggy/preview" allow="autoplay"></iframe> src="https://drive.google.com/file/d/1XD-Kz0eBydtyXn1BPPOfEn9p3hlpcXNk/preview" allow="autoplay"&gt;<br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1uEWeXNnE3Q7D9II1VzlVf4CFZBhjXwJv/preview" allow="autoplay"></iframe> &lt;iframe width="100%" height="480" Creator An entity primarily responsible for making the resource Bereket Haileab Aluminosilicate Aluminum-Rich Sediment Amphibolite Facies Biotite Blueschist facies Chlorite Convergent Margin Foliation High-Pressure Metamorphism Index Mineral Interference figures Kyanite Low-Temperature Metamorphism metamorphic muscovite pelitic protolith Pleochroic halo Regional metamorphism San Diego Geology schist Staurolite Tourmaline Zircon