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💧🌏 Greg CocksGregCocks@techhub.social
2025-04-25

Unaweep Canyon - Two Creeks Flow Out Of Either End Of This [Colorado] Canyon In Opposite Directions
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atlasobscura.com/places/unawee <-- shared technical article
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doi.org/10.1130/GES01112.1 <-- shared paper
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[seems like a motorcycle road trip is in order - and happy to visit this beautiful part of the world again]
#geology #colorado #paleovalley #UnaweepCanyon #unaweep #precambrian #unique #divide #water #hydrology #underfit #drainage #EastCreek #WestCreek #Dolores #Uncompahgre #UncompahgrePlateau #erosion #Gunninson #canyon #Tabeguache #mapping #geologicmapping #fieldwork #Cenozoic #gravel #sediment #rockcore #coring #lacustrine #geomorphology #geomorphometry #dating #landform #volcanics #tectonics

💧🌏 Greg CocksGregCocks@techhub.social
2025-01-02

Thermodynamic Model Identifies How Gold Reaches Earth's Surface
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phys.org/news/2024-12-thermody <-- shared technical article
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doi.org/10.1073/pnas.240473112 <-- shared paper
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#geology #structuralgeology #mantle #crust #tectonics #platetectonics #gold #preciousmetals #subduction #mantle #crust #sulfur #RingOfFire #volcano #volcanics #magma #model #modeling #trisulfur #pressure #temperature #geochemistry #subductionzone #thermodynamics

AI image - miner holding a large gold nugget in his handcross sections and charts - Mineral assemblages and dominant sulfur species in the devolatilization fluid for an average AOC along the hot (central Cascadia) and cold (central Honshu) subduction pressure–temperature (P-T) paths.cross sections and charts - Mantle wedge oxidation models showing the oxidation capacity of slab devolatilization fluids.cross sections - Proposed scenarios for progressive devolatilization and redox processes at slab–mantle interface.
💧🌏 Greg CocksGregCocks@techhub.social
2024-04-17

Cenozoic Exhumation Across The High Plains Of Southeastern Colorado From (U-Th)/He Thermochronology
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doi.org/10.2113/2023/lithosphe <-- shared paper
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[as a geologist and an adventure rider – and a Colorado resident that loves history - I have travelled all over this area; first photo is mine, my motorcycle under the Apishapa Arch in Aguilar, Colorado, a 1930s Civilian Conservation Corps project through a volcanic dyke, ‘coincidentally’ providing better access to land that a senator had purchased up around Cuchara and Cordova Passes]
#GIS #spatial #mapping #geology #Colorado #structuralgeology #Cenozoic #Thermochronology #model #modeling #3dmodeling #HighPlains #RockyMountains #Tertiary #intrusives #volcanics #vulcanism #SpanishPeaks #ApishapaArch #dates #dating #erosions #peneplanation #dikes #dykes

Schematic [geologic] cross-section of Cenozoic exhumation in the High Plains from the Spanish Peaks (A - west) to Two Buttes (A’ - east).Geologic map of the Spanish Peaks-Two Buttes study area with sample locations marked.The ~24 Ma Spanish Peaks intrusions now stand over 2 km above their surroundings.[as a geologist and an adventure rider – and a Colorado resident that loves history - I have travelled all over this area; this photo is mine, my motorcycle under the Apishapa Arch in Aguilar, Colorado, a 1930s Civilian Conservation Corps project through a volcanic dyke, ‘coincidentally’ providing better access to land that a senator had purchased up around Cuchara and Cordova Passes]
💧🌏 Greg CocksGregCocks@techhub.social
2023-07-07

Earthquake Activity In Fagradalsfjall [Volcanic] Area [Iceland]
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en.vedur.is/about-imo/news/ear <-- monitoring records
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#GIS #spatial #mapping #Keilir #Fagradalsfjall #LitliHrútur #Reykjanes #iceland #volcano #volcanics #vulcanism #magma #earthquakes #eruption #earthquake #epicenter #remotesensing #satellite #cosmo #skymed #monitoring #seismic #seismology #deformation #normalisation #spatialanalysis #spatiotemporal #dike #dyke #intrusion #ground #elevation #fault #movement #gischat

Chris WhiteCeedave@sciencemastodon.com
2023-01-15

Proterozoic Mattapan Volcanics (Zm)
These felsic rocks are exposed on the south of the Boston Basin, and lay between the Dedham Granite and the Roxbury Conglomerate. They correlate to the Lynn Volcanics in Middlesex Fells and elsewhere north of Boston. The Roxbury (PzZr) mapped on Hough’s Neck (east of “Quincy”, map) is at least partly Mattapan, as seen at Rock Island (lower photos), which was quarried for “trap rock” ~ 1910. See captions for more.
#volcanics #igneous #geology #Boston #Quincy

An exposure of the Mattapan along 1-93 S near the Quincy-Braintree boundary, showing characteristic orange hue and angular fractures. The freeway guardrail is visible at the bottom, and low trees appear below a blue sky. From Apple Maps.A crop from the 1983 USGS bedrock map of Massachusetts focuses on the southeast edge of the Boston Basin. Mattapan (Zm) is exposed at the Braintree-Quincy border as shown in the first photograph. It is also exposed on Hough’s Neck, east of Quincy, in the area marked PzZr (Roxbury Conglomerate), and shown in the photographs following. Mattapan is also exposed on Wampatuck Hill (103 meters) at the east end of the Blue Hill range, and in Mattapan!A black and white photo shows the abandoned Tide Water (also known as Old Colony) Broken Stone Co. quarry on Rock Island, Hough’s Neck, Quincy, Massachusetts, USA. Marshy ground covered with grass is at the lower left, a rock face of Mattapan Volcanics appears at the right, and bare winter trees are on the skyline above the rock. My photo.A landscape photograph looking northeast across the Rock Island Cove Marsh from State Street on Hough’s Neck, Quincy, Massachusetts, USA. Bare sumac limbs frame the bottom of the photo, and branching tidal channels cut through the marsh in the middle ground. The marsh is brown in winter dormancy. At left center, a knob of Mattapan Volcanics is a headland projecting into the marsh. It is covered with trees, and the abandoned quarry is further east, beyond the trees. My photo.

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