Florida Beach Atlas

Monroe County Descriptions

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Munsell Color Classifications (pdf)

MO-01
Calcarenite; Very Light Orange to Grayish Orange; Grain Type: Intraclast, Skeletal; 99% Allochemical Constituents; Grain Size: Medium; Range: Fine to Granule (2-4 mm); Unconsolidated; Accesory Minerals: Organics-01%, Quartz Sand-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Echinoid, Ostracods; Archaias angulatus
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MO-02
Calcarenite; Very Light Orange; Grain Type: Intraclast, Skeletal; 99% Allochemical Constituents; Grain Size: Medium; Range: Fine to Very Course; Unconsolidated; Accesory Minerals: Organics-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Bryozoa, Echinoid; Archaias angulatus; Ammonia beccarii (many are pink)
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MO-03
Calcarenite; Very Light Orange; Grain Type: Intraclast, Skeletal; 99% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Accesory Minerals: Heavy Minerals-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Bryozoa, Echinoid; Archaias angulatus; Sand-size chunks of metallic minerals; Pink forams (ammonia beccarii); Milliolids
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MO-04
Calcarenite; Very Light Orange to Moderate Yellowish Brown; Grain Type: Intraclast, Skeletal, Calcilutite; 95% Allochemical Constituents; Grain Size: Microcrystalline; Range: Fine to Course; Unconsolidated; Accesory Minerals: Organics-03%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Bryozoa, Echinoid; Archaias angulatus
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MO-05
Calcarenite; Very Light Orange to Grayish Orange; Grain Type: Intraclast, Skeletal; 99% Allochemical Constituents; Grain Size: Medium; Range: Fine to Very Course; Unconsolidated; Accesory Minerals: Organics-<1%, Quartz Sand-<1%, Heavy Minerals-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Bryozoa, Ostracods; Archaias angulatus; Milliolids
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MO-06
Calcarenite; Very Light Orange; Grain Type: Intraclast, Skeletal; 99% Allochemical Constituents; Grain Size: Medium; Range: Fine to Medium; Unconsolidated; Accesory Minerals: Organics-<1%, Heavy Minerals-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Bryozoa, Echinoid; Archaias angulatus; Pink Rotalliina sp.
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MO-07
Sand; Very Light Orange to Grayish Orange; Grain Size: Medium; Range: Fine to Very Course; Roundness: Angular to Rounded; Low Sphericity; Unconsolidated; Accesory Minerals: Shell-<1%, Organics-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Plant Remains; Well-graded
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MO-08-SS
Calcarenite; Very Light Orange to Yellowish Gray; Grain Type: Intraclast, Skeletal, Calcilutite; 97% Allochemical Constituents; Grain Size: Fine; Range: Microcrystalline to Very Course; Unconsolidated; Accesory Minerals: Heavy Minerals-<1%, Organics- <1%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Benthic Foraminifera, Miliolids; Archaias angulatus
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MO-08-BB
Calcarenite; Very Light Orange to Grayish Brown; Grain Type: Intraclast, Skeletal, Calcilutite; 95% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Accesory Minerals: Organics-10%, Quartz Sand-02%; Other Features: Weathered; Fossils: Fossil Fragments, Plant Remains, Mollusks, Benthic Foraminifera, Echinoid; Archaias angulatus
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MO-09
Calcarenite; White to Very Light Orange; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Benthic Foraminifera; Archaias angulatus
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MO-10
Calcarenite; Very Light Orange to Grayish Orange; Grain Type: Intraclast, Skeletal, Calcilutite; 60% Allochemical Constituents; Grain Size: Medium; Range: Fine to Very Course; Unconsolidated; Accesory Minerals: Organics-25%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Barnacles, Echinoid, Coral; Small chunks of well-indurated cemented LS (fossiliferous packstone); Archaias angulatus; Milliolids; Green echinoids
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MO-11-SS
Calcarenite; White to Very Light Orange; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Other Features: Weathered; Fossils: Fossil Fragments, Benthic Foraminifera; Archaias angulatus
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MO-11-BB
Calcarenite; Very Light Orange; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Accesory Minerals: Quartz Sand-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Benthic Foraminifera; Archaias angulatus
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MO-12
Calcarenite; Very Light Orange to Grayish Brown; Grain Type: Intraclast, Skeletal, Calcilutite; 95% Allochemical Constituents; Grain Size: Medium; Range: Microcrystalline to Very Course; Unconsolidated; Accesory Minerals: Organics-<1%, Heavy Minerals-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Coral;
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MO-14
Calcarenite; Yellowish Gray to Grayish Brown; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Fine; Range: Very Fine to Medium; Unconsolidated; Accesory Minerals: Heavy Minerals-02%; Other Features: Weathered; Fossils: Fossil Fragments; Phosphatized shells
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MO-15
Calcarenite; Yellowish Gray to Light Gray; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Accesory Minerals: Heavy Minerals-02%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Bryozoa, Echinoid, Benthic Foraminifera; Archaias angulatus; Green echinoids; Some phospatized shells
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MO-16
Calcarenite; Yellowish Gray to Light Gray; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Fine; Range: Very Fine to Medium; Unconsolidated; Accesory Minerals: Heavy Minerals-01%, Organics-01%; Other Features: Weathered; Fossils: Fossil Fragments, Bryozoa, Benthic Foraminifera, Coral, Plant Remains; Archaias angulatus; Some phosphatized shells
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MO-18
Calcarenite; Very Light Orange to Grayish Brown; Grain Type: Intraclast, Skeletal, Calcilutite; 85% Allochemical Constituents; Grain Size: Course; Range: Microcrystalline to Granule (2-4 mm); Unconsolidated; Accesory Minerals: Organics-04%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Benthic Foraminifera; Archaias angulatus; Gastropods
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MO-19
Shell Bed; Very Light Orange to Grayish Brown; Unconsolidated; Accesory Minerals: Calcilutite-02%; Other Features: Weathered; Fossils: Fossil Fragments, Mollusks, Coral, Benthic Foraminifera; Archaias angulatus; Gastropods
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MO-20
Shell Bed; Very Light Orange to Moderate Yellowish Brown; Unconsolidated; Accesory Minerals: Organics-03%, Heavy Minerals-02%; Fossils: Fossil Fragments, Mollusks, Plant Remains; Gastropods make-up majority of shells in sample
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MO-21
Calcarenite; Very Light Orange to Moderate Yellowish Brown; Grain Type: Intraclast, Skeletal, Calcilutite; 90% Allochemical Constituents; Grain Size: Course; Range: Microcrystalline to Granule (2-4 mm); Unconsolidated; Accesory Minerals: Organics-05%, Clay-02%; Other Features: Weathered; Fossils: Fossil Fragments, Coral, Mollusks, Benthic Foraminifera, Plant Remains; Archaias angulatus; Gastropods; Milliolids
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MO-22
Calcarenite; Very Light Orange; Grain Type: Intraclast, Skeletal, Calcilutite; 95% Allochemical Constituents; Grain Size: Course; Range: Fine to Very Course; Unconsolidated; Fossils: Fossil Fragments, Coral, Mollusks, Benthic Foraminifera, Bryozoa; Archaias angulatus
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MO-23
Calcarenite; Very Light Orange to Grayish Orange; Grain Type: Intraclast, Skeletal, Calcilutite; 90% Allochemical Constituents; Grain Size: Course; Range: Fine to Very Course; Unconsolidated; Accesory Minerals: Organics-05%, Clay-02%; Fossils: Fossil Fragments, Coral, Mollusks, Benthic Foraminifera, Plant Remains; Archaias angulatus
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MO-24
Shell Bed; Very Light Orange to Moderate Yellowish Brown; Unconsolidated; Accesory Minerals: Organics-03%, Clay-02%; Fossils: Fossil Fragments, Mollusks, Coral, Echinoid, Plant Remains; Archaias angulatus; Gastropods
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MO-25
Sand; White to Very Light Orange; Grain Size: Medium; Range: Fine to Course; Roundness: Angular to Subangular; Medium Sphericity; Unconsolidated; Accesory Minerals: Calcarenite-20%, Limestone-10%; Fossils: Fossil Fragments, Mollusks, Miliolids;
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MO-26
Calcarenite; Very Light Orange to Light Gray; Grain Type: Intraclast, Skeletal, Calcilutite; 98% Allochemical Constituents; Grain Size: Medium; Range: Fine to Course; Unconsolidated; Accesory Minerals: Organics-01%, Heavy Minerals-<1%; Other Features: Weathered; Fossils: Fossil Fragments, Bryozoa, Benthic Foraminifera; Archaias angulatus
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MO-27
Shell Bed; Very Light Orange to Moderate Yellowish Brown; Unconsolidated; Accesory Minerals: Organics-05%; Fossils: Fossil Fragments, Mollusks, Coral, Plant Remains, Benthic Foraminifera; Archaias angulatus; Gastropods
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MO-28-SS
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Fine to Very Course; Roundness: Angular to Subrounded; Low Sphericity; Unconsolidated; Accesory Minerals: Calcarenite-15%, Organics-01%; Well-graded
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MO-28-BB
Sand; Very Light Orange to Grayish Orange; Grain Size: Medium; Range: Fine to Very Course; Roundness: Angular to Subrounded; Low Sphericity; Unconsolidated; Accesory Minerals: Organics-<1%;
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MO-29-SS
Sand; Very Light Orange to Grayish Orange; Grain Size: Medium; Range: Fine to Course; Roundness: Angular to Subrounded; Low Sphericity; Unconsolidated; Accesory Minerals: Calcarenite-25%, Heavy Minerals-<1%, Organics-01%; Fossils: Fossil Fragments, Benthic Foraminifera, Bryozoa, Plant Remains; Archaias angulatus et al.; Possibly oolites and pellets
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MO-29-BB
Sand; Very Light Orange to Grayish Brown; Grain Size: Medium; Range: Fine to Course; Roundness: Angular to Subangular; Low Sphericity; Unconsolidated; Accesory Minerals: Calcarenite-35%, Limestone-05%, Heavy Minerals-<1%; Fossils: Fossil Fragments, Benthic Foraminifera, Coral; Archaias angulatus
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MO-30
Calcarenite; Very Light Orange to Grayish Orange; Grain Type: Intraclast, Skeletal; 98% Allochemical Constituents; Grain Size: Medium; Range: Fine to Very Course; Unconsolidated; Accesory Minerals: Quartz Sand-25%; Fossils: Fossil Fragments, Benthic Foraminifera, Fossil Molds;
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