TY - JOUR
T1 - Sedimentological Characteristics of Regional-Scale Washover Deposits Caused by Hurricane Ivan
AU - Horwitz, Mark H
AU - Wang, Ping
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Washover deposits induced by Hurricane Ivan are examined along a 260-km stretch of northern Florida coast. Initial response to the overwash event is dominated by dramatic nearshore, beach, and dune erosion. Eroded sediment is in-turn redistributed landward across the barrier-island profile. Distinct sedimentological characteristics of the washover deposits are recognized in different barrier-island sub-environments. Deposits on the beach are bound by a basal erosional surface, and exhibit planar seaward-dipping stratification. Over the barrier interior, preservation of fresh, in-place vegetation below the washover indicates that limited erosion occurred prior to washover deposition landward of the foredune. Washover deposits over the interior platform are characterized by horizontal to sub-horizontal stratification. Increased accommodation space landward within flooded interior wetlands and the back-bay yields substantially thicker washover deposits characterized by steeply inclined sigmoid and tabular foreset stratification. Back-bay deposition locally accounts for 120 m of landward bayside-shoreline migration.
AB - Washover deposits induced by Hurricane Ivan are examined along a 260-km stretch of northern Florida coast. Initial response to the overwash event is dominated by dramatic nearshore, beach, and dune erosion. Eroded sediment is in-turn redistributed landward across the barrier-island profile. Distinct sedimentological characteristics of the washover deposits are recognized in different barrier-island sub-environments. Deposits on the beach are bound by a basal erosional surface, and exhibit planar seaward-dipping stratification. Over the barrier interior, preservation of fresh, in-place vegetation below the washover indicates that limited erosion occurred prior to washover deposition landward of the foredune. Washover deposits over the interior platform are characterized by horizontal to sub-horizontal stratification. Increased accommodation space landward within flooded interior wetlands and the back-bay yields substantially thicker washover deposits characterized by steeply inclined sigmoid and tabular foreset stratification. Back-bay deposition locally accounts for 120 m of landward bayside-shoreline migration.
UR - https://digitalcommons.usf.edu/gly_facpub/243
UR - https://doi.org/10.1061/40926(239)81
U2 - 10.1061/40926(239)81
DO - 10.1061/40926(239)81
M3 - Article
JO - Coastal Sediments '07
JF - Coastal Sediments '07
ER -