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Title: Bedrock controls of sedimentation along a marsh-dominated, open-marine, low energy coastline: west-central Florida

Abstract

The northwestern peninsular Florida coast is microtidal, low wave energy. Topographic complexity is due to karstified Tertiary limestone, actively discharging freshwater springs, and lack of pre-Holocene sediment veneer. This complexity helps control local sedimentary processes. In the southern part of the field area a near continuous, thin Pleistocene quartz sand allows a marsh-fronting berm and simpler shoreline morphology. To the north, freshwater springs have formed shallow estuarine embayments containing linear oyster bioherms, nucleated upon local bedrock highs. These molluscan reefs enclose interbiothermal basins, segmenting the embayments. Between the embayments are archipelagoes of marsh islands and tidal creeks. Their complex topography was formed from selective dissolution along rectilinear fractures, creating linear lows which when drowned by rising sea level formed the largest tidal creeks. Marsh islands formed on intervening low-relief knobs. These commonly support oases of less salt tolerant shrubs and trees, surrounded by Juncus roemerianus marsh. Landward to seaward changes in rock/sedimentation relationships suggest an evolutionary pattern during sea-level rise. Upland forests become hammocks surrounded by marsh. Hammocks become islands surrounded by tidal creeks. Submerged hammocks finally become highs supporting oyster reefs. Preservation potential during the present slow transgression is low, due primarily to the low relief.

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of South Florida, St. Petersburg (USA)
OSTI Identifier:
6200820
Report Number(s):
CONF-8510489-
Journal ID: CODEN: GAAPB
Resource Type:
Conference
Journal Name:
Geol. Soc. Am., Abstr. Programs; (United States)
Additional Journal Information:
Journal Volume: 17; Conference: 98. annual meeting of the Geological Society of America, Orlando, FL, USA, 28 Oct 1985
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; COASTAL REGIONS; GEOMORPHOLOGY; TOPOGRAPHY; FLORIDA; CAVES; CENOZOIC ERA; EROSION; GEOLOGIC HISTORY; MARSHES; REEFS; SEDIMENTATION; SEDIMENTS; AQUATIC ECOSYSTEMS; CAVITIES; ECOSYSTEMS; FEDERAL REGION IV; GEOLOGIC AGES; GEOLOGIC STRUCTURES; GEOLOGY; NORTH AMERICA; USA; WETLANDS; 580100* - Geology & Hydrology- (-1989)

Citation Formats

Hine, A C, Belknap, D F, Osking, E B, Hutton, J,G., and Evans, M R. Bedrock controls of sedimentation along a marsh-dominated, open-marine, low energy coastline: west-central Florida. United States: N. p., 1985. Web.
Hine, A C, Belknap, D F, Osking, E B, Hutton, J,G., & Evans, M R. Bedrock controls of sedimentation along a marsh-dominated, open-marine, low energy coastline: west-central Florida. United States.
Hine, A C, Belknap, D F, Osking, E B, Hutton, J,G., and Evans, M R. 1985. "Bedrock controls of sedimentation along a marsh-dominated, open-marine, low energy coastline: west-central Florida". United States.
@article{osti_6200820,
title = {Bedrock controls of sedimentation along a marsh-dominated, open-marine, low energy coastline: west-central Florida},
author = {Hine, A C and Belknap, D F and Osking, E B and Hutton, J,G. and Evans, M R},
abstractNote = {The northwestern peninsular Florida coast is microtidal, low wave energy. Topographic complexity is due to karstified Tertiary limestone, actively discharging freshwater springs, and lack of pre-Holocene sediment veneer. This complexity helps control local sedimentary processes. In the southern part of the field area a near continuous, thin Pleistocene quartz sand allows a marsh-fronting berm and simpler shoreline morphology. To the north, freshwater springs have formed shallow estuarine embayments containing linear oyster bioherms, nucleated upon local bedrock highs. These molluscan reefs enclose interbiothermal basins, segmenting the embayments. Between the embayments are archipelagoes of marsh islands and tidal creeks. Their complex topography was formed from selective dissolution along rectilinear fractures, creating linear lows which when drowned by rising sea level formed the largest tidal creeks. Marsh islands formed on intervening low-relief knobs. These commonly support oases of less salt tolerant shrubs and trees, surrounded by Juncus roemerianus marsh. Landward to seaward changes in rock/sedimentation relationships suggest an evolutionary pattern during sea-level rise. Upland forests become hammocks surrounded by marsh. Hammocks become islands surrounded by tidal creeks. Submerged hammocks finally become highs supporting oyster reefs. Preservation potential during the present slow transgression is low, due primarily to the low relief.},
doi = {},
url = {https://www.osti.gov/biblio/6200820}, journal = {Geol. Soc. Am., Abstr. Programs; (United States)},
number = ,
volume = 17,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}

Conference:
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