Florida Beach Atlas

Martin County Descriptions

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Munsell Color Classifications (pdf)

MT-01-SS
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-40%; Fossils: Fossil Fragments, Mollusks, Miliolids
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MT-01-BB
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-45%; Fossils: Fossil Fragments, Benthic Foraminifera
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MT-02-SS
Shell Bed; Very Light Orange to Moderate Light Gray; Unconsolidated; Accessory Minerals: Quartz Sand-45%; Fossils: Fossil Fragments, Mollusks, Barnacles
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MT-02-BB
Shell Bed; Very Light Orange to Moderate Light Gray; Unconsolidated; Accessory Minerals: Quartz Sand-48%; Fossils: Fossil Fragments
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MT-03-SS
Shell Bed; Very Light Orange to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-45%; Fossils: Fossil Fragments
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MT-03-BB
Shell Bed; Very Light Orange to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-45%; Fossils: Fossil Fragments, Mollusks
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MT-04-SS
Shell Bed; Yellowish Gray to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-20%; Fossils: Fossil Fragments, Mollusks, Barnacles
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MT-04-BB
Shell Bed; Grayish Orange to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-15%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa
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MT-05-SS
Shell Bed; Very Light Orange to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-05%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Echinoids; Multiple Bryozoans
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MT-05-MB
Shell Bed; Yellowish Gray to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-40%; Fossils: Fossil Fragments, Mollusks, Barnacles, Miliolids; Shell Fragments Appear to be Remineralized
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MT-05-BB
Shell Bed; Yellowish Gray to Moderate Light Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Fossils: Fossil Fragments, Mollusks, Bryozoa, Miliolids; Shell Fragments Appear to be Remineralized
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MT-06
Sand; Yellowish Gray to Moderate Light Gray; Unconsolidated; Accessory Minerals: Quartz Sand-15%, Heavy Minerals-01%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa
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MT-07
Sand; Yellowish Gray to Moderate Light Gray; Unconsolidated; Accessory Minerals: Quartz Sand-20%; Fossils: Fossil Fragments, Mollusks, Barnacles, Miliolids
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MT-08
Sand; Very Light Orange to Grayish Orange; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-45%; Fossils: Fossil Fragments
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MT-09-SS
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-40%; Fossils: Fossil Fragments, Miliolids
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MT-09-BB
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-45%; Other Features: Weathered; Fossils: Fossil Fragments, Bryozoa, Miliolids
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MT-10
Shell Bed; Very Light Orange to Grayish Brown; Unconsolidated; Accessory Minerals: Quartz Sand-45%; Other Features: Weathered; Fossils: Fossil Fragments, Miliolids
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MT-11
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-45%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks
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MT-12
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-48%; Fossils: Fossil Fragments, Mollusks
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MT-13-SS
Sand; Very Light Orange to Moderate Light Gray; Grain Size: Medium; Range: Very Fine to Very Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-45%; Fossils: Fossil Fragments, Mollusks, Miliolids
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MT-13-BB
Sand; Very Light Orange to Light Gray; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-35%; Fossils: Fossil Fragments
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MT-14-SS
Sand; Very Light Orange to Light Gray; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-40%; Fossils: Fossil Fragments, Miliolids
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MT-14-BB
Shell Bed; Very Light Orange to Grayish Brown; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Fossils: Fossil Fragments, Barnacles, Miliolids
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MT-15-SS
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Very Fine to Coarse; Roundness: Angular to Sub-Rounded; Medium Sphericity; Unconsolidated; Accessory Minerals: Shell-40%; Fossils: Fossil Fragments, Mollusks, Miliolids
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MT-15-BB
Shell Bed; Yellowish Gray to Moderate Light Gray; Unconsolidated; Accessory Minerals: Quartz Sand-45%; Fossils: Fossil Fragments, Mollusks, Barnacles, Echinoids, Miliolids
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MT-16-SS
Shell Bed; Yellowish Gray to Olive Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Fossils: Fossil Fragments, Mollusks, Barnacles, Benthic Foraminifera
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MT-16-BB
Shell Bed; Very Light Orange to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-35%; Fossils: Fossil Fragments, Mollusks, Barnacles, Miliolids; Forams include Triloculina spp.
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MT-17
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-40%; Other Features: Weathered; Fossils: Fossil Fragments, Bryozoa, Miliolids
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MT-18-SS
Shell Bed; Very Light Orange to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-35%; Other Features: Weathered; Fossils: Fossil Fragments, Miliolids; Majority of Shell Frags are Well-Rounded
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MT-18-BB
Shell Bed; Very Light Orange to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-25%, Calcilutite-01%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Miliolids
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MT-19
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Benthic Foraminifera
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MT-20
Shell Bed; Very Light Orange to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-25%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Benthic Foraminifera
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MT-21
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa
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MT-22-SS
Shell Bed; Yellowish Gray to Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-25%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Bryozoa, Benthic Foraminifera; Archais spp.; Shell Fragments Well-Rounded
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MT-22-BB
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-35%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Benthic Foraminifera; Archais spp.
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MT-23-SS
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-35%; Fossils: Fossil Fragments, Mollusks, Bryozoa, Echinoids, Benthic Foraminifera
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MT-23-BB
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Bryozoa, Benthic Foraminifera
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MT-24-SS
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Bryozoa, Benthic Foraminifera
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MT-24-MB
Shell Bed; Yellowish Gray to Moderate Gray; Unconsolidated; Accessory Minerals: Quartz Sand-40%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Bryozoa, Benthic Foraminifera
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MT-24-BB
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-25%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Benthic Foraminifera; Forams include Triloculina spp. and Archais spp.
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MT-25-SS
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-08%; Fossils: Fossil Fragments, Mollusks, Planktonic Foraminifera, Bryozoa, Benthic Foraminifera
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MT-25-BB
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-30%; Other Features: Weathered; Fossils: Fossil Fragments, Bryozoa; Shell Fragments Well-Rounded
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MT-26-SS
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-25%; Other Features: Weathered; Fossils: Fossil Fragments, Bryozoa, Benthic Foraminifera; Forams include Archais spp., Triloculina spp., and Eponides sp.
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MT-26-BB
Shell Bed; Yellowish Gray to Moderate Dark Gray; Unconsolidated; Accessory Minerals: Quartz Sand-05%; Fossils: Fossil Fragments, Mollusks, Barnacles, Bryozoa, Benthic Foraminifera; Forams include Archais spp.
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