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Soil/Landscape Relationships in a Mesotidal Maine Estuary

Dep. of Plant, Soil and Environmental Sciences, Univ. of Maine, Orono, ME 04469-5722

View larger version (70K): [in this window] [in a new window]   Fig. 1. Maps presenting the location of the study site. A. Location of Hancock County in Maine, Taunton Bay watershed in Hancock County, and Taunton Bay estuary within the Taunton Bay watershed. B. Towns, roads, and coastline of the Taunton Bay estuary.

View larger version (137K): [in this window] [in a new window]   Fig. 2. Perimeter of the study area and locations where latitude, longitude and depth measurements were collected in Taunton Bay estuary. The three circles identify the locations of the tide gauges. The base map for the figure is the 1996 USGS digital orthophoto quad for this portion of Hancock County, Maine.

View larger version (110K): [in this window] [in a new window]   Fig. 3. Landscape units, bathymetry and soil map units of the Taunton Bay estuary. A. Landscape units (black lines) and bathymetry (white lines) in the soil-landscape study area. Each white line represents contours with equivalent depths below mean sea level. The contour intervals are 50 cm to a depth of 2 m. The 2 m line represents all surface greater than 2 m depth. B. Soil map unit delineations within Terrestrial Edge; Submerged Beach, Submerged Delta, Submerged Marshes and Streams, and Shallow and Deep Coastal Coves and other landscape units present on the western portion of the study area.

View larger version (90K): [in this window] [in a new window]   Fig. 4. Schematic cross-section illustrating the presence and stratigraphy of parent materials along a hypothetical soil transect from the water's edge to the center of the estuary channel in Taunton Bay estuary. The black vertical lines on the transect define where one landscape unit ends and the next begins. Where space is limited in the figure, landscape unit names are abbreviated. "Edge" refers to the Terrestrial Edge landscape unit. The Channel Shoulder landscape unit is abbreviated "Ch. Shoulder." The thin, gray vertical lines on the transect indicate the locations where vibracore-derived soil morphology data was used to generate the figure. The question marks at the interface between the bedrock and the glacial till are used to illustrate that while this sequence of parent materials is known to occur, this sequence was not observed in any of the profiles sampled for this study. The glaciomarine sediment parent material in this figure is also referred to as the Presumpscot Formation.