Table T4. Lithologic units and subunits, Site 1199, and tentative correlation with units defined at Site 1196.
| Unit | Subunit | Hole 1196A | Hole 1196B | Hole 1199A | Description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Core | Depth (mbsf) | Core | Depth (mbsf) | Core | Depth (mbsf) | |||||||||
|
Top
|
Base
|
Top
|
Base
|
Top
|
Base
|
Top
|
Base
|
Top
|
Base
|
Top
|
Base
|
|||
| I | IA | 1R-1, 0 | 13R-2, 100 | 0.0 | 117.2 | 1R-1, 0 | 17Z-1, 0 | 0.0 | 122.9 | 1R-1, 0 | 13R-3, 0 | 0.0 | 106.2 | Dolomitic floatstone/rudstone. Grainstone matrix. Distinctive constituents are centimeter-sized rhodoliths. Dolomitization is not pervasive. |
| IB | 13R-2, 100 | 14R-2, 20 | 117.2 | 125.9 | 17Z-1, 0 | 20Z-1, 20 | 122.9 | 130.5 | 13R-3, 0 | 14R-1, 87 | 106.2 | 112.7 | Dolomitic floatstone. Constituents include larger benthic foraminifers (seen as molds) and branching red algal debris. Natural gamma ray peak at base. | |
| IC | 14R-2, 20 | 18R-1, 0 | 125.9 | 162.8 | 20Z-1, 20 | 24Z-1, 0 | 130.5 | 145.0 | 14R-1, 87 | 15R-1, 49 | 112.7 | 121.9 | Skeletal rudstone/boundstone with colonial corals. At Site 1199, this facies has been dolomitized and has likely been subaerially exposed. | |
| ID | 18R-1, 0 | 20R-1, 27 | 162.8 | 182.2 | 24Z-1, 0 | 33Z-1, 0 | 145.0 | 184.9 | 15R-1, 49 | 19R-1, 0 | 121.9 | 159.8 | Dolomitic floatstone. Predominant constituents include larger benthic foraminifers, which are commonly dissolved, and branching red algal fragments. Rare coral is present. | |
| II | IIA | 20R-1, 27 | 35R-1, 40 | 182.2 | 335.9 | 33Z-1, 0 | ? | 184.9 | 19R-1, 0 | 32R-1, 6 | 159.8 | 285.0 | Skeletal floatstone/grainstone. Predominant constituents are porcellaneous benthic foraminifers and centimeter-sized mollusk fragments. Nannofossil age is 13.6-18.2 Ma at 218 mbsf and at 316 mbsf at Site 1196. Foraminifer age is 13.3-15.2 Ma throughout the unit. Friable at Site 1196, harder and slightly dolomitized at Site 1199. | |
| IIB | 36R-1, 0 | 37R-1, 30 | 335.9 | 345.8 | 32R-1, 10 | 45R-1, 10 | 285.0 | 410.0 | Skeletal grainstone/floatstone. Well sorted. Contains benthic foraminifers, echinoids, red algae, and possibly Halimeda. Floatstone intervals include centimeter-sized rhodoliths. Only poorly recovered at Site 1196 where the upper part shows a partly dolomitized reefal facies. | |||||
| III | IIIA | 37R-1, 30 | 38R-1, 20 | 345.8 | 412.7 | 45R-1, 6 | ? | 409.9 | ? | Sucrosic dolostone. Rare relicts of centimeter-sized rhodoliths are preserved. Coarsely crystalline. | ||||
Notes: Hole 1196A end of core at 672.2 mbsf, Hole 1196B end of core at 265.3 mbsf, Hole 1199A end of core at 419.5 mbsf. ? = not defined.