Geologic Map of the Cecilton and Middletown Quadrangles, Delaware
Date
2020-09
Authors
Tomlinson, J.L.
Ramsey, K.W.
Journal Title
Journal ISSN
Volume Title
Publisher
Newark, DE: Delaware Geological Survey, University of Delaware
Abstract
Mapping was conducted using field maps at a scale of 1:12,000 with 2-ft contours. Stratigraphic boundaries drawn at topographic breaks reflect detailed mapping using contours not shown on this map. Most stratigraphic units mapped in stream valleys are projected from subsurface data. Except for a few erosional bluffs, these units are covered by colluvium. This map supersedes Geology of the Middletown-Odessa Area, Delaware: Delaware Geological Survey Geologic Map Series No. 2 (Pickett and Spoljaric, 1971).
The geology of the map area reflects a complex history with a cut and fill geometry where the Pleistocene-aged deposits incised into older units. The Tertiary deposits were modified by erosion and deposition of the Columbia Formation during the early Pleistocene and again by the Lynch Heights and Scotts Corners Formations as a result of sea-level fluctuations during the middle to late Pleistocene. The geology is further complicated by periglacial activity that produced Carolina Bay deposits in the map area, which modified the land surface.
Description
Keywords
Lower Cretaceous , fill , modified land , swamp deposits , marsh deposits , Carolina Bay deposits , Scotts Corners Formation , Lynch Heights Formation , Columbia Formation , Beaverdam Formation , Calvert Formation , Calvert Formation , Navesink Formation , Hornerstown Formation , Mount Laurel Formation , Marshalltown Formation , Englishtown Formation , Merchantville Formation , sand , clay , Glauconite , Map Application , Cecilton , Middletown , Odessa , Delaware , New Castle County, DE , Cenozoic Era , Quaternary Period , Holocene , upper Holocene , lower Holocene , Pleistocene , upper Pleistocene , middle Pleistocene , lower Pleistocene , Tertiary Period , Neogene , Pliocene , upper Pliocene , lower Pliocene , Miocene , Miocene , upper Miocene , middle Miocene , lower Miocene , Paleogene , Oligocene , Eocene , upper Eocene , middle Eocene , lower Eocene , Paleocene , Mesozoic Era , Cretaceous Period , Upper Cretaceous