Record details

Title
    Reconstruction of eroded monogenic Strombolian cones of Miocene age: A case study on character of volcanic activity of the Jičín Volcanic Field (NE Bohemia) and subsequent erosional rates estimation
Author
    Cajz, Vladimír
    Košťák, M.
    Pécskay, Z.
    Radoň, M.
    Rapprich, V.
    Raška, P.
    Řídkošil, T.
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 52, 3-4
Pages
    s. 169-180
Year
    2007
Notes
    Projekt: IAA300130612, GA AV ČR
    Překlad názvu: Rekonstrukce erodovaných miocénních monogenetických strombolských kuželů: studium charakteru vulkamické aktivity jičínského vulkanického pole (sv. Čechy) a odhad rychlosti povulkanické eroze
    Rozsah: 12 s. : WWW
    Výzkumný záměr: CEZ:AV0Z30130516
Subject category
    Bohemian Paradise GeoPark
    cinder cone
    erosion rate
    Jičín Volcanic Field
    Strombolian eruption
    volcanic facies
Keyword
    Activity
    Age
    Bohemia
    Case
    Character
    Cones
    Eroded
    Erosional
    Estimation
    Field
    Jičín
    Miocene
    Monogenic
    NE
    Rates
    Reconstruction
    Strombolian
    Study
    Subsequent
    Volcanic
Abstract (in czech)
   Relics of solitary volcanic edifices in NE Bohemia were newly interpreted as remnants of scoria cones and their conduits. Volcanic activity in this area occurred in a form of scattered Strombolian eruptions of basanitic magmas mostly ascending along E-W trending faults. Nearly all studied volcanoes erupted in similar style, Strombolian, mostly not producing larger lava flows. This volcanic activity took place mainly during Miocene (24.6-16.5 Ma). The lavas known on the Kozákov Hill were produced by much younger volcanic activity (6.7-3.5 Ma) and one of the studied locations is supposed to represent their feeder. The older Strombolian cones are relatively weakly affected by weathering processes. The erosion level at individual sites depends on geomorphology. On some of the edifices non-welded, poorly stratified scoriae are well preserved, at other sites a basal facies or upper vent facies were exposed by selective erosion.
Contributor
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
    U
Import date
    8. 8. 2012