publications > water resources investigations > report 00-4251 > appendix i > mowry canal core

Mowry Canal Core

Depth (feet below land surface)	Lithologic description
0.0 - 1.0	Rubble of mollusk lime floatstone with peloid, oolitic lime grainstone matrix, very pale orange 10YR 8/2; fine to medium grain size, ranges from fine to pebble; 25 percent vuggy, oomoldic and pelmoldic porosity; very high hydraulic conductivity; root molds.
1.0 - 3.0	Rubble of bryozoan lime floatstone with peloid, oolitic lime grainstone matrix, very pale orange 10YR 8/2; fine to medium and pebble grain size, ranges from fine to pebble; branching bryozoans; 25 percent oomoldic, intraparticle and vuggy porosity; very high hydraulic conductivity.
3.0 - 4.0	Rubble of oolitic lime grainstone, very pale orange 10YR 8/2; fine to medium grain size; mollusks; 25 percent oomoldic, vuggy and root-mold porosity; very high hydraulic conductivity; interval contains a laminated calcrete, less than 7-millimeters thick, that is partly blackened soil or phosphatized; pebbles of this darkened calcrete occur above the surface, probably as a transgressive lag.
4.0 - 5.0	No recovery.
5.0 - 5.8	Muddy soil, pale-yellowish-brown 10YR 6/2; clay to very fine grain size.
5.8 - 6.8	Rubble of oolitic lime grainstone, very pale orange 10YR 8/2; medium grain size, ranges from medium to pebble; mollusks; 25 percent oomoldic and interparticle porosity; very high hydraulic conductivity.
6.8 - 12.3	Rubble of oolitic lime grainstone, very pale orange 10YR 8/2; medium grain size, ranges from medium to pebble; mollusks; 25 percent oomoldic, vuggy and interparticle porosity; very high hydraulic conductivity; Holocene black soil near top.
12.3 - 12.5	No recovery.
12.5 - 12.7	Rubble of oolitic lime grainstone, very pale orange 10YR 8/2; medium grain size, ranges from medium to pebble; mollusks; 25 percent oomoldic, vuggy and interparticle porosity; very high hydraulic conductivity.
12.7 - 12.9	No recovery.
12.9 - 15.8	Rubble of oolitic lime grainstone and bryozoan lime floatstone with oolitic lime grainstone matrix, very pale orange 10YR 8/2; medium grain size, ranges from medium to pebble; branching bryozoans and mollusks; 25 percent oomoldic, interparticle and vuggy porosity; very high hydraulic conductivity, very thin laminated calcrete at 13.1 feet.
15.8 - 17.5	Mollusk lime floatstone with oolitic lime grainstone matrix, very pale orange 10YR 8/2; medium grain size, ranges from medium to pebble; gastropods; 30 percent oomoldic, vuggy and interparticle porosity; very high hydraulic conductivity.
17.5 - 18.0	No recovery.
18.0 - 19.5	Mollusk lime floatstone with burrowed, oolitic lime grainstone matrix, very pale orange 10YR 8/2; medium grain size, ranges from medium to pebble; gastropods, 5 percent fine quartz sand in matrix, root molds with laminated calcrete linings throughout interval; 30 percent oomoldic, vuggy and interparticle porosity; very high hydraulic conductivity.
19.5 - 21.8	No recovery.
21.8 - 22.6	Mollusk, peneroplid lime floatstone with oolitic grainstone matrix, very pale orange 10YR 8/2 to very light gray N8; medium and pebble grain size, ranges from medium to pebble; 5 percent fine quartz sand in matrix; 30 percent oomoldic, vuggy and interparticle porosity; very high hydraulic conductivity; root molds with laminated calcrete linings throughout interval.
22.6 - 22.8	Peneroplid lime floatstone with quartz-sand-rich calcrete matrix, very pale orange 10YR 8/2 to very light gray N8; clay to fine grain size; fine quartz sand in calcrete matrix; 5 percent interparticle porosity; very low hydraulic conductivity; root molds with laminated calcrete throughout matrix, possible exposure surface at 22.6 feet.
22.8 - 26.0	No recovery.
26.0 - 28.0	Mollusk, peneroplid lime floatstone with quartz-sand-rich, skeletal fragment lime grainstone and packstone matrix, very pale orange 10YR 8/2; clay and very fine to fine, ranges from clay to pebble; peloids, 25 percent very fine to fine quartz sand; 25 percent moldic, vuggy and interparticle porosity; moderate hydraulic conductivity; Caleonassid burrows and peloid fill.
28.0 - 30.0	No recovery.
30.0 - 32.5	Mollusk, peneroplid lime floatstone and rudstone with skeletal fragment, quartz-sand-rich lime packstone matrix; very pale orange 10YR 8/2; clay, very fine to fine and pebble, ranges from clay to pebble; 20 percent very fine to fine quartz sand; 25 percent moldic and very vuggy porosity; very high hydraulic conductivity; cobble-sized calcrete clasts at base of interval.
32.5 - 32.9	Laminated calcrete, grayish orange 10YR 7/4 to moderate yellowish brown 10YR 5/4; clay to very fine; 5 percent very fine quartz sand; 5 percent interparticle porosity; very low hydraulic conductivity; calcrete bounds a significant exposure surface.
32.9 - 34.2	Skeletal lime floatstone with quartz-sand-rich lime packstone matrix, very pale orange 10YR 8/2 to very light gray N8; clay to medium grain size, ranges from clay to pebble; peneroplids and mollusks, 40 percent very fine to medium quartz sand; 15 percent moldic and vuggy porosity; moderate hydraulic conductivity; root molds lined with laminated calcrete.
34.2 - 35.0	No recovery.
35.0 - 37.2	Skeletal fragment, quartz-sand-rich lime grainstone and packstone and quartz sandstone; very pale orange 10YR 8/2 to light gray N7 to very light gray N8; very fine grain size, ranges from clay to pebble; peneroplids and miliolids, 40 to 60 percent very fine quartz sand; 15 percent vuggy, moldic and interparticle porosity with minor solution channels; moderate hydraulic conductivity; root molds lined with laminated calcrete near top.
37.2 - 41.0	No recovery.
41.0 - 42.0	Mainly rubble of skeletal-fragment-rich quartz sand, very pale orange 10YR 8/2 to very light gray N8; very fine grain size, ranges from very fine to granule; miliolids and peneroplids, 30 percent very fine quartz sand; 20 percent vuggy and interparticle porosity with minor solution channels; moderate hydraulic conductivity.
42.0 - 47.0	No recovery.
47.0 - 48.3	Quartz-sand-rich, skeletal fragment lime packstone and grainstone, very pale orange 10YR 8/2 to very light gray N8; clay to very fine, ranges from clay to granule; miliolids, peneroplids, mollusks and one coral, 10 percent very fine to medium quartz sand; 20 percent vuggy and moldic porosity with minor solution channels; moderate hydraulic conductivity.
48.3 - 50.7	No recovery.
50.7 - 52.3	Skeletal lime floatstone with quartz-sand-rich, skeletal-fragment lime packstone and grainstone matrix, very pale orange 10YR 8/2 to very light gray N8; clay and very fine to medium grain size, ranges from clay to pebble; miliolids, mollusks, gastropods, dasyclad algae and stick-like Porites coral; 20 percent very fine to medium quartz sand; 20 percent vuggy, moldic and interparticle porosity; moderate hydraulic conductivity; possible laminated 8-millimeter-thick calcrete at 51.2 feet, packstone matrix above and grainstone matrix below calcrete.
52.3 - 54.3	Skeletal fragment, quartz-sand-rich lime packstone, mottled very pale orange 10YR 8/2 and pale-yellowish-brown 10YR 6/2; clay to medium grain size, ranges from clay to pebble; 20 percent very fine to medium quartz grains, skeletal fragments, mollusks, gastropods and miliolids; 20 percent moldic and vuggy porosity with solution channels; moderate hydraulic conductivity; empty and quartz-sand-rich lime packstone and skeletal fragment quartz-sand-filled lime packstone, 1-millimeter-thick laminated calcrete lines solution channels.
54.3 - 55.0	Gastropod lime floatstone with quartz-sand-rich lime packstone matrix, pale-yellowish-brown 10YR 6/2; fine to medium grain size; gastropods, 20 to 40 percent fine to medium quartz sand; 20 percent moldic porosity; moderate hydraulic conductivity; probably lacustrine depositional environment.
55.0 - 55.8	No recovery.
55.8 - 57.0	Gastropod lime floatstone with quartz-sand-rich lime packstone matrix, pale-yellowish-brown 10YR 6/2; clay to medium grain size; gastropods, 20 to 40 percent fine to medium quartz sand; 20 percent moldic porosity; moderate hydraulic conductivity; probably lacustrine depositional environment.
57.0 - 59.0	Skeletal fragment lime floatstone with quartz-sand-rich lime packstone and skeletal, quartz-sand-rich packstone; very pale orange 10YR 8/2 to very light gray N8; clay to medium grain size, ranges from clay to pebble; gastropods, mollusks, miliolids and peneroplids; 20 to 40 percent very fine to medium quartz sand; 20 percent moldic and vuggy porosity; moderate hydraulic conductivity.
59.0 - 60.0	Mollusk, skeletal lime floatstone with skeletal fragment quartz sandstone matrix; clay to medium grain size ranges from clay to pebble; miliolids, mollusks and peneroplids, 40 percent very fine to medium quartz grains; quartz sandstone contains a lime mud matrix; 20 percent vuggy and moldic porosity with solution channels; moderate hydraulic conductivity; truncated root molds at top of interval and root molds with laminated calcrete linings (grayish orange 10YR 7/4) throughout interval, probable exposure surface at top of interval.
60.0 - 60.5	No recovery.
60.5 - 62.5	Skeletal fragment, quartz sandstone with lime mud matrix, very pale orange 10YR 8/2 to grayish orange 10YR 7/4 to very light gray N8; clay and fine to medium; ranges from clay to granule; mollusks and miliolids, 20 to 40 percent fine to medium quartz grains; 20 percent moldic and vuggy porosity with minor solution channels; moderate hydraulic conductivity; interval riddled with root molds lined with laminated calcrete.
62.5 - 63.0	Skeletal lime grainstone, very light gray N8 and grayish orange 10YR 7/4; fine grain size, ranges from very fine to pebble; miliolids and peneroplids, 10 percent very fine quartz sand; 10 percent interparticle porosity; low hydraulic conductivity.
63.0 - 70.5	No recovery.
70.5 - 71.4	Mollusk skeletal lime floatstone with skeletal lime grainstone matrix, very pale orange 10YR 8/2; very fine to medium and pebble grain size, ranges from very fine to pebble; stick-like Porites corals and dasyclad algae, 40 percent very fine to medium quartz sand; 30 percent interparticle, moldic and large vuggy porosity with solution channels; high hydraulic conductivity.
71.4 - 72.5	Skeletal fragment lime grainstone, very pale orange 10YR 8/2; fine to medium grain size, ranges from very fine to granule; peneroplids, 10 percent fine quartz sand; 20 percent interparticle porosity with minor solution channels; moderate hydraulic conductivity.
72.5 - 75.4	No recovery.
75.4 - 76.2	Skeletal fragment lime grainstone, very pale orange 10YR 8/2; fine to medium grain size, ranges from very fine to granule; peneroplids, 10 percent fine quartz sand; 20 percent interparticle porosity with minor solution channels; moderate hydraulic conductivity.
76.2 - 77.0	Skeletal fragment lime floatstone with quartz-sand-rich, skeletal lime grainstone matrix, very pale orange 10YR 8/2 and very light gray N8; very fine to medium and pebble grain size, ranges from very fine to pebble; mollusks, dasyclad algae and peneroplids, 10 to 40 percent very fine to fine quartz sand; 30 percent interparticle porosity with solution channels; high hydraulic conductivity.
77.0 - 79.5	Skeletal fragment lime floatstone with quartz-sand-rich, skeletal lime grainstone matrix, very pale orange 10YR 8/2 and very light gray N8; very fine to medium and pebble grain size, ranges from very fine to pebble; mollusks, dasyclad algae and peneroplids, 10 to 40 percent very fine to fine quartz sand; 20 percent moldic and interparticle porosity; moderate hydraulic conductivity.
79.5 - 80.5	No recovery.
80.5 - 81.0	Rubble of skeletal fragment lime floatstone with quartz-sand-rich, skeletal lime grainstone matrix, very pale orange 10YR 8/2 and very light gray N8; very fine to medium and pebble grain size, ranges from very fine to pebble; mollusks, dasyclad algae and peneroplids, 10 to 40 percent very fine to fine quartz sand; 20 percent moldic and interparticle porosity; moderate hydraulic conductivity.
81.0 - 83.8	Skeletal lime rudstone with quartz-sand-rich, skeletal lime grainstone, very pale orange 10 YR 8/2; very fine to pebble grain size, ranges from very fine to pebble; mollusks and echinoids, 10 to 40 percent very fine to fine quartz sand; 20 percent moldic and interparticle porosity; moderate hydraulic conductivity.
83.8 - 86.0	No recovery.
86.0 - 86.2	Skeletal lime floatstone with quartz-sand-rich, lime packstone, pale-yellowish-brown 10 YR 6/2; clay to medium grain size, ranges from clay to pebble; mollusks and echinoids, 20 percent very fine to fine quartz sand; 20 percent moldic and interparticle porosity; moderate hydraulic conductivity; root molds lined with laminated calcrete, exposure surface near or at top of interval at 86 feet.
86.2 - 86.6	Skeletal quartz-sand-rich lime wackestone, pale-yellowish-brown 10YR 6/2; clay to very fine, ranges from clay to coarse; 1 percent very fine to fine quartz sand; 10 percent fenestral(?) porosity; low hydraulic conductivity; root molds lined with laminated calcrete.
86.6 - 87.3	Mollusk lime floatstone with quartz-sand-rich, skeletal lime packstone matrix, very pale orange 10YR 8/2; clay to pebble grain size; mollusks, miliolids, 40 percent very fine to fine quartz sand; 15 percent moldic and root mold porosity; low hydraulic conductivity; root molds lined with laminated calcrete.
87.3 - 88.0	Mollusk lime floatstone with quartz-sand-rich, skeletal lime packstone matrix, very pale orange 10YR 8/2; clay to pebble grain size; mollusks, miliolids, 40 percent very fine to fine quartz sand; 20 percent moldic and root mold porosity; moderate hydraulic conductivity; root molds lined with laminated calcrete.
88.0 - 90.5	No recovery.
90.5 - 90.9	Skeletal lime grainstone, very pale orange 10YR 8/2; very fine to fine, ranges from very fine to coarse; mollusks and miliolids; 10 percent moldic porosity; low hydraulic conductivity.
90.9 - 91.6	Skeletal lime floatstone with quartz-sand-rich lime packstone matrix, very pale orange 10YR 8/2; clay to coarse, ranges from clay to pebble; mollusks, 20 to 40 percent very fine to fine quartz sand, 15 percent moldic porosity with solution channels; moderate hydraulic conductivity.
91.6 - 94.0	Mollusk lime floatstone with quartz-sand-rich, skeletal fragment lime packstone and grainstone, very pale orange 10YR 8/2 to very light gray N8; clay to fine grain size, ranges from clay to pebble; mollusks, gastropods, miliolids and peneroplids, 40 percent very fine to medium quartz sand; 20 percent moldic and vuggy solution channels with minor solution channels; high hydraulic conductivity.
94.0 - 95.4	Skeletal lime floatstone and rudstone with skeletal, quartz-sand-rich lime packstone, very pale orange 10YR 8/2 to very light gray N8; clay to pebble grain size, ranges from clay to pebble; mollusks, 10 percent fine to medium quartz sand; 25 percent vuggy and moldic porosity; moderate hydraulic conductivity.
95.4 - 96.0	Rubble of skeletal fragment, quartz-sand-rich lime grainstone, very pale orange 10YR 8/2 to very light gray N8; very fine to medium grain size, ranges from very fine to medium; 10 percent very fine quartz sand; 10 percent interparticle porosity; low hydraulic conductivity.
96.0 - 100.5	Molluscan lime floatstone and rudstone with quartz-sand-rich, skeletal lime packstone, very pale orange 10YR 8/2 to very light gray N8; clay to pebble grain size; ranges from clay to pebble; mollusks and gastropods, 10 to 30 percent very fine to medium quartz sand; 20 percent moldic and vuggy porosity; moderate hydraulic conductivity.

U.S. Department of the Interior, U.S. Geological Survey
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Last updated: 20 January, 2005 @ 01:23 PM (KP)