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Correlations between Holocene flood tidal delta and barrier island inlet fill sequences: Back Sound‐Shackleford Banks, North Carolina
Author(s) -
BERELSON WILLIAM M.,
HERON S. DUNCAN
Publication year - 1985
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1985.tb00504.x
Subject(s) - inlet , geology , barrier island , delta , flood myth , oceanography , marsh , facies , sedimentary rock , deposition (geology) , sedimentation , river delta , geomorphology , sound (geography) , holocene , estuary , sediment , paleontology , shore , archaeology , structural basin , ecology , wetland , aerospace engineering , biology , engineering , history
Large, well‐developed flood tidal deltas on a barrier island coastline generally indicate a wave‐dominated, microtidal sedimentary regime. Vibracores in a lagoon behind the barrier island Shackleford Banks, North Carolina contain an upward fining sequence of coarse‐medium, very shelly sand, medium‐fine laminated sand, fine‐very fine cross‐laminated sand and marsh mud. This sequence is interpreted as being a flood tidal delta deposit based on analogy with modern flood tidal delta sediments and represents lagoonal deposition in response to a migrating or closing inlet. The sand facies defined in lagoonal vibracores is found to be continuous beneath a lagoonal marsh and correlative with inlet sections identified in Shackleford Banks drill holes. The correlation of flood tidal delta deposits with inlet sequences in this microtidal environment indicates a close relationship between barrier and backbarrier inlet controlled sedimentation.