PETROGRAPHY OF THE COE LIMESTONE, SHUTTLE MEADOW FM. (JURASSIC), SOUTHERN HARTFORD BASIN, CT
Detailed petrographic examination and cathodoluminescence have revealed previously unrecorded textures that support interpretation of the Coe Limestone deposit as a sublacustrine seep. Hydrologic changes including subaerial exposure, fluctuations in salinity, and meteoric mixing have been identified. Textural findings include fossiliferous facies not previously identified, suggesting alkaline or freshwater conditions. Pedogenic fabrics represented in various lithologies include skewed planar matrices within a muddy, clotted groundmass, infilling of vugs/fenestrals with silt- to sand-sized detritus, corroded grains, and baroque dolomitic spar fill within fractures and fenestrals. Other mineralogical constituents include iron oxide pseudomorphs, spherulites of microcrystalline quartz/chalcedony, and anhydrite.