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001-es BibID:	BIBFORM096165
Első szerző:	Csámer Árpád (geológus)
Cím:	Evidences of phreatomagmatic explosion in the Sarmatian andesitic pyroclastic rocks exposed at the vaults of Szirmabesenyő (Tardona Hills, NE Hungary) = Freatomagmás kitörés bizonyitékai szarmata andezit piroklasztit összletben a szirmabesenyői pincesoron (Trdonai-dombság, ÉK-Magyarország) / Árpád Csámer, Miklós Kozák
Dátum:	2007
Megjegyzések:	One of the dominant and less known geological formations in the northern foreland of the Bükk Mts. is the Late Miocene Dubicsány Andesite Formation (DAF), which is built up by intermediate pyroclastic rocks and dykes. Detailed volcanologicalpetrographical investigations were performed on the exposures of DAF near Sajóbábony. On the basis of our volcanological and textural analysis the Late Miocene andesitic pyroclastic rocks are non-bedded, or slightly bedded, poorly sorted, coarse-grained, lithic-rich, eroded volcaniclastic rocks, which are deposited in terrestrial environment. Their textural and structural character suggests that they would have been debris-flows or mass-flows with high particle density. The groundwater derived from the coarse-grained aquifers of the shallow prevolcanic basement played an important role in the fragmentation of the magma, while the thick, cohesive, swelling Badenian ? Early Sarmatian clay deposits of the shallow basement could have blocked the ascending magma and the explosion was delayed and throttled down for a while. As a result of the subsurface phreatomagmatic explosion saturated and lithic-rich ?slurry" was deposited with high particle concentration. Andesitic volcaniclastic rocks with same textural and structural character can be found in the entire territory of the Tardona Hills, from Miskolc to Putnok.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk Sarmatian andesite pyroclastic rock phreatomagmatic texture analysis
Megjelenés:	Acta Geographica Ac Geologica et Meteorologica Debrecina: Geology Geomorphology Physical Geography Series. - 2 (2007), p. 105-114. -
További szerzők:	Kozák Miklós (1948-) (geológus)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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