Understanding magma transport in sheet intrusions is crucial to interpreting volcanic unrest. Studies of dyke emplacement and geometry focus predominantly on low-viscosity, mafic dykes. Here, we present an in-depth study two high-viscosity dykes (106 Pa·s) the Chachahuén volcano, Argentina, Great Dyke Sosa Dyke. To quantify geometries, flow indicators, viscosity, combine photogrammetry, microst...

The observed seismic anisotropy of the southern African mantle from both shear-wave splitting and surface wave observations provides important constraints on modes of mantle deformation beneath this ancient continent. We find that the mantle anisotropy beneath southern Africa is dominated by deformational events in Archean times occurring within the lithosphere, rather than present-day processe...

Dan Llywleyn Hall is a painter who spent three years walking and making paintings inspired by Offa’s Dyke. Born in Cardiff 1980, now lives near the border Llanfyllin where his studio based. He has recently taken on role of guest Editor Borderlands – revised Newsletter–cum–Journal that published twice year behalf Dyke Association. With new introduction, key components 2021 Walking with Offa proj...

dyke-davidoff-masson syndrome (ddms) is a syndrome associated with refractory epilepsy. ddms is a rare syndrome characterized by seizures, facial asymmetry, contralateral hemiplegia and mental retardation. the characteristic radiologic features are cerebral hemiatrophy with homolateral hypertrophy of the skull and sinuses. the case was an 18 years old female with seizures, hemiparesis of the ri...

dyke swarms emplacement constitutes one of the conspicuous features of the neoproterozoic arabian-nubian shield (ans) (~950-540ma). based on field investigations, petrographic and geochemical characteristics the dyke swarms in nw sinai (egypt) comprise of mafic (dolerite-trachy-basalt-basalt), intermediate (basaltic-andesite trachy-andesite) and felsic (rhyodacite-rhyolite) varieties. geochemic...

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