https://bereket-haileab.geology.sites.carleton.edu/files/original/06fd2e7fc788d0e52f1334cb8f8a7e79.jpg 0a2a1fa8e53ddbbe74dfac67e5492251 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 Igneous Rocks Subject The topic of the resource This collection covers both volcanic and intrusive rocks, including rhyolites, granites, diorites, andesites, basalts, gabbros, diabases, pumices, obsidians, syenites, phonolites, peridotites, carbonatites, dacites, trachyte, dunites, xenoliths, ignimbrites, and pegmatites. 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 BH250-181 Subject The topic of the resource Gabbro Description An account of the resource Major Minerals: clinopyroxene, orthopyroxene, olivine Minor Minerals: hornblende, plagioclase, biotite, oxides, serpentine, chlorite BH250-181 is a peridotite composed of olivine (mostly altered), orthopyroxene (Opx), and clinopyroxene (Cpx) in roughly equal proportions. This mineral assemblage is most consistent with a harzburgite, a specific variety of peridotite. The presence of biotite and hornblende in the peridotite indicates hydrous metasomatism — enrichment of the mantle peridotite by fluids or hydrous melts introduced from external sources, typically associated with subduction zones or deep lithospheric processes. The minerals in this rock show strong alteration, with extensive serpentinization of olivine and pyroxenes visible throughout the thin section. Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample BH250-181. Housed at Carleton College in Minnesota. Type The nature or genre of the resource Hand sample and 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=5d3f95ca83a745caa41b5e7e4443fdf4" 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=5d3f95ca83a745caa41b5e7e4443fdf4">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/13cSMZHY8lzNJ0_G7vlGKfp54Iqz1HioV/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1YmJrXvCLpJmH7_A6YQhlomyauPSz1vHW/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1eBKrujbSKFWHqjT-BSSKf-ua2cnmnOpi/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1XjfiGZqff9MrjZPoqK9Zn4pKM-XraxMU/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1y4Qk4FhnqoHzVAODYoOFwMUr9TTf8ctG/preview" allow="autoplay"></iframe><br /><br />&nbsp;&nbsp; <br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1CyByUrOWuSRWb063boPCR3GAo2tHGHod/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1-H4vxKign0DtCFk-WfKRbtpody_flShv/preview" allow="autoplay"></iframe> Creator An entity primarily responsible for making the resource Bereket Haileab Biotite Clinopyroxene gabbro harzburgite Hornblende igneous mafic olivine Orthopyroxene peridotite plutonic