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Prehistoric trade routes in the Lake Okeechobee Region
Title
Prehistoric trade routes in the Lake Okeechobee Region: evidence from the RItta Island and Kreamer Island sites.
Creator
Mount, Gregory J., Dorothy F. Schmidt College of Arts and Letters, Department of Anthropology
Abstract/Description
During pre-Columbian times, the Lake Okeechobee Region was home to people of the Belle Glade culture. The lake provided an area rich in resources that facilitated not only the hunter-gatherer-fisher lifestyle of the people but also supported increased cultural complexity. Over time, people participated in an exchange network, trading materials with cultural groups from a variety of locations. This thesis provides an analysis of those non-local artifacts, their probable points of origins and...
Show moreDuring pre-Columbian times, the Lake Okeechobee Region was home to people of the Belle Glade culture. The lake provided an area rich in resources that facilitated not only the hunter-gatherer-fisher lifestyle of the people but also supported increased cultural complexity. Over time, people participated in an exchange network, trading materials with cultural groups from a variety of locations. This thesis provides an analysis of those non-local artifacts, their probable points of origins and the type of exchange that facilitated the movement of these goods into the region.
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Date Issued
2009
PURL
http://purl.flvc.org/FAU/217112
Subject Headings
Navigation, Prehistoric, Trade routes, Excavations (Archaeology), Antiquities
Format
Document (PDF)
Multi-scale characterization of dissolution structures and porosity distribution in the upper part of the Biscayne aquifer using ground penetrating radar (GPR)
Title
Multi-scale characterization of dissolution structures and porosity distribution in the upper part of the Biscayne aquifer using ground penetrating radar (GPR).
Creator
Mount, Gregory J., Comas, Xavier, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
The karst Biscayne aquifer is characterized by a heterogeneous spatial arrangement of porosity, making hydrogeological characterization difficult. In this dissertation, I investigate the use of ground penetrating radar (GPR), for understanding the spatial distribution of porosity variability in the Miami Limestone presented as a compilation of studies where scale of measurement is progressively increased to account for varying dimensions of dissolution features. In Chapter 2, GPR in zero...
Show moreThe karst Biscayne aquifer is characterized by a heterogeneous spatial arrangement of porosity, making hydrogeological characterization difficult. In this dissertation, I investigate the use of ground penetrating radar (GPR), for understanding the spatial distribution of porosity variability in the Miami Limestone presented as a compilation of studies where scale of measurement is progressively increased to account for varying dimensions of dissolution features. In Chapter 2, GPR in zero offset acquisition mode is used to investigate the 2-D distribution of porosity and dielectric permittivity in a block of Miami Limestone at the laboratory scale (< 1.0 m). Petrophysical models based on fully saturated and unsaturated. water conditions are used to estimate porosity and solid dielectric permittivity of the limestone. Results show a good correspondence between analytical and GPR-based porosity estimates and show variability between 22.0-66.0 %. In Chapter 3, GPR in common offset and common midpoint acquisition mode are used to estimate bulk porosity of the unsaturated Miami Limestone at the field scale (10.0-100.0 m). Estimates of porosity are based on the assumption that the directly measured water table reflector is flat and that any deviation is attributed to changes in velocity due to porosity variability. Results show sharp changes in porosity ranging between 33.2-60.9 % attributed to dissolution areas. In Chapter 4, GPR in common offset mode is used to characterize porosity variability in the saturated Biscayne aquifer at 100-1000 m field scales. The presence of numerous diffraction hyperbolae are used to estimate electromagnetic wave velocity and asses both horizontal and vertical changes in porosity after application of a petrophysical model. Results show porosity variability between 23.0-41.0 % and confirm the presence of isolated areas that could serve as enhanced infiltration or recharge. This research allows for the identification and delineation areas of macroporosity areas at 0.01 m lateral resolution and shows variability of porosity at different scales, reaching 37.0 % within 1.3 m, associated with areas of enhanced dissolution. Such improved resolution of porosity estimates can benefit water management efforts and transport modelling and help to better understand small scale relationships between ground water and surface water interactions.
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Date Issued
2014
PURL
http://purl.flvc.org/fau/fd/FA00004143
Subject Headings
Ground penetrating radar, Limestone -- Florida -- Miami Dade County -- Analysis, Physical geology, Sedimentary basins -- Florida -- Biscayne Aquifer, Sedimentation analysis
Format
Document (PDF)