https://bereket-haileab.geology.sites.carleton.edu/files/original/3c12827ba41408aa296166195c6fba40.jpg f4400e4b5e7686c6c38739a918493152 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 BH250-204 Subject The topic of the resource Gabbro, Stillwater Complex Description An account of the resource Major Minerals: Enstatite (orthopyroxene), anorthite (plagioclase) Minor Minerals: Augite (clinopyroxene), titanaugite (clinopyroxene), sulfide (visible in handsample), serpentine Texture: coarse grained, intrusive rock with ophitic texture. Optics: Well-formed (euhedral) pyroxene crystals are present, with interstitial plagioclase feldspars ranging from euhedral to subhedral, reflecting the sequence of crystallization an excellent example for interpreting phase relationships using a no-solid solution binary phase diagram. Exsolution lamellae are observed within orthopyroxene, hosting inclusions of clinopyroxene. Alteration: There is strong evidence of hydrothermal fluid interaction, marked by vein formation and significant alteration of pyroxenes to serpentine. Additionally, late-stage crystallization of sulfides such as pyrite is evident. 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: Montana, USA GPS Coordinates: 45°23'21.17"N, 109°52'43.86"W Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample BH250-204. 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=a8dd46fd93c444cb9df4324a4e55c3cb" 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=a8dd46fd93c444cb9df4324a4e55c3cb">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/109E-0XJuqfGUVl7QgLyIO0l6UMjSuOBq/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1DMNkGkPO6IMRwlyWxDKI5sMZXecGJgmJ/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1eVyccKkV6TLXhxmQdG_j0ArZQNqw7ecs/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1fyyjfAFdVspmf0GVWUyGLgc3Des26ymZ/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1QJYZHP76Raj2uQ3mqp060hdHLB8_JwQz/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/131Tt8sNL0WwE1JtjzKx9eoc9X_uNBlUA/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1tbey9SikU9b7uLo5fE_CbZGPUf542Cdl/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1NEYeHPOFcQlK-i7oRDOg6ll7ODMkwMmy/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1BJW0HqCYGFmScgUAszeMHs6TRVHd0XQb/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1FUClD3s3DEkvpuTlS8ADA6Nz4t-lpAkX/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/16HJ4TYaDaU6LFP9-Bi64MOg-aeThK93w/preview" allow="autoplay"></iframe><br /><br /><iframe width="640" height="480" src="https://drive.google.com/file/d/1kb-JaUgmFkYR57Axf9HdTXUbm7wnrxd8/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 Anorthite Augite Clinopyroxene Clinopyroxene inclusions Coarse-grained Enstatite Euhedral pyroxene Exsolution lamellae gabbro Hydrothermal alteration igneous Igneous petrology Interstitial plagioclase Intrusive texture Layered mafic intrusion mafic Mafic intrusive Minor Minerals Montana geology olivine Orthopyroxene Orthopyroxene host Plagioclase feldspar plutonic Pyrite Pyroxene alteration Serpentine (alteration) Serpentinization Stillwater Complex Subhedral plagioclase Sulfide minerals Sulfide veins Titanaugite