Coarse-grained, marine, sub-wave base, high-angle clinoform sets: A little-known outcrop facies illustrated by Jurassic examples from East Greenland
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Coarse-grained, marine, sub-wave base, high-angle clinoform sets : A little-known outcrop facies illustrated by Jurassic examples from East Greenland. / Surlyk, Finn; Larsen, Michael.
I: Basin Research, Bind 35, Nr. 4, 2023, s. 1509-1529.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Coarse-grained, marine, sub-wave base, high-angle clinoform sets
T2 - A little-known outcrop facies illustrated by Jurassic examples from East Greenland
AU - Surlyk, Finn
AU - Larsen, Michael
N1 - Publisher Copyright: © 2023 International Association of Sedimentologists and European Association of Geoscientists and Engineers and John Wiley & Sons Ltd.
PY - 2023
Y1 - 2023
N2 - Outcrops of coarse-grained, high-angle clinoform sets are mainly thought to represent Gilbert-type deltas. Superficially similar clinoform sets may, however, form in marine, sub-wave base settings. They are interpreted to have formed as a result of storms where downwelling, seaward-directed currents transported sand from the coastal area and shoreface across the shelf in suspension or as bedload to be deposited as clinothems. An additional transport of sand took place by strong coast-parallel currents. The clinoform sets appear to be associated with rift events, the creation of accommodation space and an increasing supply of coarse-grained sediment. A major protracted rift phase was initiated in East Greenland in Middle Jurassic times and intensified through the Late Jurassic to reach a climax close to the Jurassic–Cretaceous boundary. Rifting caused uplift of borderlands, creation of accommodation space and development of shallow marine shelves passing offshore into submarine slopes and deeper basinal areas. Each rift event was accompanied by the formation of clinoform sets prograding seawards towards the east and southeast away from the cratonic coastline in water depths below the wave base. The clinoform sets are interpreted as typical motifs for rift events in the relatively shallow epeiric Jurassic seaway between East Greenland and Norway. Outcrops of such sets represent a little-known, commonly misinterpreted sedimentary system and may serve as motifs for rifting in shallow marine areas elsewhere in the geological record. Similar sets have been recorded in outcrop from the Mediterranean, and elsewhere and are probably more common than hitherto realized.
AB - Outcrops of coarse-grained, high-angle clinoform sets are mainly thought to represent Gilbert-type deltas. Superficially similar clinoform sets may, however, form in marine, sub-wave base settings. They are interpreted to have formed as a result of storms where downwelling, seaward-directed currents transported sand from the coastal area and shoreface across the shelf in suspension or as bedload to be deposited as clinothems. An additional transport of sand took place by strong coast-parallel currents. The clinoform sets appear to be associated with rift events, the creation of accommodation space and an increasing supply of coarse-grained sediment. A major protracted rift phase was initiated in East Greenland in Middle Jurassic times and intensified through the Late Jurassic to reach a climax close to the Jurassic–Cretaceous boundary. Rifting caused uplift of borderlands, creation of accommodation space and development of shallow marine shelves passing offshore into submarine slopes and deeper basinal areas. Each rift event was accompanied by the formation of clinoform sets prograding seawards towards the east and southeast away from the cratonic coastline in water depths below the wave base. The clinoform sets are interpreted as typical motifs for rift events in the relatively shallow epeiric Jurassic seaway between East Greenland and Norway. Outcrops of such sets represent a little-known, commonly misinterpreted sedimentary system and may serve as motifs for rifting in shallow marine areas elsewhere in the geological record. Similar sets have been recorded in outcrop from the Mediterranean, and elsewhere and are probably more common than hitherto realized.
KW - East Greenland
KW - Jurassic
KW - marine high-angle clinoform sets
KW - rift events
U2 - 10.1111/bre.12763
DO - 10.1111/bre.12763
M3 - Journal article
AN - SCOPUS:85150902531
VL - 35
SP - 1509
EP - 1529
JO - Basin Research
JF - Basin Research
SN - 0950-091X
IS - 4
ER -
ID: 342668854