An improved chronology for the Arthur’s Seat volcano and Carboniferous magmatism of the Midland Valley of Scotland

  title={An improved chronology for the Arthur’s Seat volcano and Carboniferous magmatism of the Midland Valley of Scotland},
  author={Alison A. Monaghan and Michael A.E. Browne and Dan N. Barfod},
Synopsis The Early Carboniferous Arthur’s Seat volcano in central Edinburgh is of geological significance and landscape value but lacks a precise chronology. New 40Ar/39Ar step-heating plateau analyses date the lowest Lava 1 of the eruptive sequence to 341.2 ± 0.8 Ma (Visean, Holkerian), with Lava 3a at 336.7 ± 4.7 Ma. Intrusive or lava-lake basalts within the Lion’s Haunch Vent are precisely dated at 338 ± 0.6 Ma at Dunsapie and 335.1 ± 0.6 Ma at Crow Hill (Visean, Asbian). Taken together with… Expand

Figures and Tables from this paper

Silicic volcanism in the Scottish Lower Carboniferous; lavas, intrusions and ignimbrites of the Garleton Hills Volcanic Formation, SE Scotland
Extensional tectonics and incipient rifting on the north side of the Iapetus suture were associated with eruption of (mainly) mildly alkaline olivine basalts. Initially in the Tournaisian (SouthernExpand
Volcaniclastic deposit (tonstein) in the Balcomie Beds, Lower Carboniferous, East Fife
A volcanogenic clay bed (tonstein) has been identified in the Balcomie Beds of the Inverclyde Group near Crail, East Fife. Its chemical composition suggests an undersaturated alkaline magma source.Expand
A geomagnetic polarity timescale for the Carboniferous
The geomagnetic polarity pattern for the Carboniferous is incompletely known, but with the best resolved parts in the Serpukhovian and Bashkirian. Hence, data from both igneous and sedimentary unitsExpand
Feeding structures in the ray-finned fish Eurynotus crenatus (Actinopterygii: Eurynotiformes): implications for trophic diversification among Carboniferous actinopterygians
ABSTRACT The Permo-Carboniferous eurynotiforms show conspicuous modifications to postcranial and cranial morphology relative to primitive actinopterygian conditions, and represent an important earlyExpand
High-performance suction feeding in an early elasmobranch
The cranial skeleton of one of the earliest known stem elasmobranchs, Tristychius arcuatus from the Middle Mississippian of Scotland is analyzed and the feeding apparatus is revealed as highly derived, capable of substantial oral expansion, and with clear potential for high-performance suction feeding some 50 million years before the earliest osteichthyan equivalent. Expand


Geochronology of Carboniferous–Permian magmatism in the Midland Valley of Scotland: implications for regional tectonomagmatic evolution and the numerical time scale
Four new U–Pb isotope dilution thermal ionization mass spectrometry dates from Carboniferous igneous rocks of the Midland Valley of Scotland are integrated with 16 recently published 40Ar/39Ar dates.Expand
40Ar/39Ar geochronology of Carboniferous-Permian volcanism in the Midland Valley, Scotland
Abstract Twenty-one new 40Ar/39Ar step-heating experiments on mineral separates from intrusive and extrusive Carboniferous and Permian igneous rocks in the Midland Valley of Scotland yielded 17Expand
III.—A Petrological Study of the Arthur's Seat Volcano.
Aethur's Seat is the remains of a dissected Lower Carboniferous volcano, from which were erupted a series of basaltic rocks representative of the province to which it belongs. The rocks occur asExpand
Carboniferous and Permian magmatism in Scotland
Abstract Extensional tectonics to the north of the Variscan Front during the Early Carboniferous generated fault-controlled basins across the British Isles, with accompanying basaltic magmatism. InExpand
Permo-carboniferous Magmatism And Rifting in Europe
Widespread extension occurred within the Variscan orogen and its northern foreland during Late Carboniferous to Early Permian times. This was associated with magmatism and with a fundamental change,Expand
The geochronology of Scottish Carboniferous volcanism
The aims of this study were to deteimine the temporal relationships, using K-Ar dating, of the complex magmatic events in the Scottish Carboniferous Petrographic Province. Volcanic activity wasExpand
Uturuncu volcano, Bolivia: Volcanic unrest due to mid-crustal magma intrusion
Uturuncu volcano, SW Bolivia, is a dormant stratovolcano (∼85 km3) dominated by dacitic lava domes and flows. 39Ar/40Ar ages show that the volcano was active between 890 ka and 271 ka, with the lavasExpand
Palynomorph and ostracod biostratigraphy of the Ballagan Formation, Midland Valley of Scotland, and elucidation of intra-Dinantian unconformaties
SUMMARY An interdisciplinary biostratigraphical study of Tournaisian–early Visean sedimentary rocks from six sections in central Scotland has established the ranges of important palynomorph andExpand
High-precision U–Pb zircon CA-ID-TIMS dates from western European late Viséan bentonites
Three new U–Pb zircon chemical abrasion isotope dilution thermal ionization mass spectrometry dates obtained from late Viséan Belgian bentonites are reported and are used to estimate the periodicityExpand
Nine 40Ar/39Ar dates from Carboniferous igneous rocks of the Midland Valley of Scotland
This report describes the location and character of ten Carboniferous-Permian igneous rock samples from the Midland Valley of Scotland and the results of 40Ar/39Ar step-heating experiments on nineExpand