| 0-5.5' |
Peat and Organic Sediment (not described). |
| 5.5-7.60' |
Grainstone - Packstone. Mixture of peloidal and skeletal grains with varying amounts of lime mud. Skeletal grains include bivalve fragments and encrusting bryozoans. Possible burrow structure below 7.5', filled with coarse skeletal sand. Bottom part of interval contains slightly high lime mud content and appears to be burrow mottled. Peloidal grains are leached and large open vugs have formed from the dissolution of the bryozoan fragments. Pelmoldic and vuggy porosity at ~30%, very high effective porosity.
2.5Y 8/3 pale yellow (tan, orange), some iron-staining in lower part of interval. |
| 7.60-8.17' |
Lime Wackestone with Calcrete. Mottled lime mud with vertical burrows and/or karst structures. Root structures. Original sediment likely modified by subaerial exposure processes.
2.5Y 8/3 pale yellow (tan) with some pink-orange oxidation staining. |
| 8.17-9.00' |
No recovery, core normalized to top of run. Base of core run at 9.0'. |
| 9.00-10.80' |
Lime Packstone. Skeletal carbonate sand consisting of bivalve, benthic foraminifers, encrusting bryozoan admixed with some lime mud. Interval is dense, very well cemented with red-orange staining and blackened grains/intraclasts. Possible calcrete horizon at ~10', orange-stained, laminated. Many skeletal grains are dissolved to give moldic porosity, some vugs. Large vug across contact with underlying lithologic unit.
2.5Y 8/3 pale yellow matrix with 2.5Y 5/3 light olive brown staining. |
| 10.80-12.42' |
Intraclast Floatstone with Wackestone (calcrete) matrix. Mud-rich wackestone texture (laminated calcrete) with breccia intraclasts likely related to subaerial exposure-related processes. Very dense, well cemented. Some open vugs, but with overall porosity probably <10%, low effective porosity.
10YR 8/1 white-pale brown with blackened grains, highly variable color. |
| 12.42-13.00' |
Lime Wackestone to Mudstone. Lime mud-rich texture with varying amounts of skeletal debris (gastropods and bivalves). Possible mottled fabric from burrowing, some burrows have more skeletal sand infill. Moldic porosity at ~10%, low effective porosity.
2.5Y 8/1 white (light tan). |
| 13.00-14.00' |
No recovery, core normalized to top of run. Base core run at 14.0'. |
| 14.00-15.20' |
Lime Wackestone. Lime mud matrix with some gastropod and bivalve allochems. Interval has differential cementation related to burrowing or perhaps due to intraclasts. Possible root-mold structures.
2.5Y 8/2 pale yellow (tan). |
| 15.20-15.50' |
Lime Mudstone (calcrete). Lime mud texture, mottled with few possible gastropod molds. Well cemented, dense. Minor moldic porosity from leached gastropod fragments.
2.5Y 8/1 white (light tan). |
| 15.50-16.50' |
Intraclast Floatstone (Soil Breccia and Calcrete). Intraclasts (>2 mm) in a lime mud (wackestone) matrix likely related to subaerial exposure processes. Dense, very well cemented. Some moldic and interparticle porosity, overall ~10%. Low effective porosity. Much of the existing fabric related to subaerial exposure affects on a marine limestone.
2.5Y 8/1 white (tan) with black/gray intraclasts. |
| 16.50-16.70' |
Lime Mudstone to Wackestone. Lime-mud rich with varying amounts of skeletal (bivalve?) debris. Moderately well cemented. Low effective porosity.
2.5Y 8/1 white (light tan). |
| 16.70-17.0' |
Lime Packstone to Wackestone. Bivalve shell mixed with a lime mud matrix. Some moldic porosity associated with skeletal allochem leaching.
2.5Y 8/1 white (light tan). |
| 17.00-19.00' |
No recovery, core normalized to top of run. Base of core run at 19.0'.
19.00-20.00' Alternating Lime Packstone to Wackestone. Mixed peloidal and skeletal (bivalve, benthic foraminifers) sand with varying amounts of lime mud. Upper part of interval has bedded peloidal(?) sands, lower part has coarse skeletal sands. Vuggy and intraparticle porosity at ~20%, moderate effective porosity.
2.5Y 8/1 to 8/2, white to pale yellow (light tan). |
| 17.00-19.00' |
No recovery, core normalized to top of run. Base of core run at 19.0'. |
| 19.00-20.00' |
Alternating Lime Packstone to Wackestone. Mixed peloidal and skeletal (bivalve, benthic foraminifers) sand with varying amounts of lime mud. Upper part of interval has bedded peloidal(?) sands, lower part has coarse skeletal sands. Vuggy and intraparticle porosity at ~20%, moderate effective porosity.
2.5Y 8/1 to 8/2, white to pale yellow (light tan). |
| 20.00-21.00' |
Alternating Lime Packstone to Grainstone. Bivalve and gastropod shell hash with varying amounts of lime mud. Some skeletal grains leached, moldic porosity at ~20%, high effective porosity.
2.5Y 8/1 to 8/2 pale yellow (white to tan). |
| 21.00-24.00' |
No recovery, core normalized to top of run. Base of core run at 24.0'. |
| 24.00-24.40' |
(rubble) Lime Packstone. Skeletal (bivalve) sand with some lime mud. Bivalves and possible gastropods, benthic foraminifers as main allochems. Moldic dissolution of skeletal grains yield moldic/vuggy porosity. Estimated high effective porosity.
2.5Y 8/1 to 8/2 pale yellow (white to tan). |
| 24.40-24.90' |
Lime Wackestone to Mudstone. Lime mud rich with some minor skeletal allochems. Possible intraclasts or soil breccia. Some vertical fractures filled with LMC calcite. Dense, very well cemented.
7.5Y 7/2 pinkish gray (tan to light brown). |
| 24.90-25.70' |
(rubble) Lime Packstone. Bivalve skeletal debris and carbonate sand with lime mud. Large dissolution vugs from either burrows or leached skeletal debris. High effective porosity.
10YR 7/2 light gray (dark tan to light brown). |
| 25.70-26.5' |
Lime Packstone to Wackestone. Well sorted, fine-medium carbonate sand matrix with varying amounts of lime mud. Moderately well cemented. Larger skeletal grains leached, some filled with LMC. 5-8% moldic and interparticle porosity.
2.5Y 8/2 pale yellow (light tan). |
| 26.5-29.00' |
No recovery, core normalized to top of run. Bottom of core at 29.0'. |
