Table T3. Lithological units and subunits, Site 1197.

Table T3. Lithological units and subunits, Site 1197.

Unit	Subunit	Hole 1197A	Hole 1197B	Description	Interpretation
Core, section, interval (cm)	Depth (mbsf)	Core, section, interval (cm)	Depth (mbsf)
Top	Base	Top	Base	Top	Base	Top	Base
I		1H-1, 0	7H-2,15	0.0	59.6					Skeletal grainstone and packstone rich in planktonic foraminifers, with bivalves and pteropods as minor components. White to yellow color.	Hemipelagic setting, minor cyclicity observed
II		9X-1, 0	?	59.6	?					Dolomitized skeletal packstone to grainstone with planktonic foraminifers, abundant larger benthic foraminifers, and neritic material. Fine grained. White to pale gray. Hardground at top.	Proximal periplatform setting (fine shed detritus)
II						2R-1, 0	14R-1, 0	59.6	175.0
III						14R-1, 0	22R-1, 0	175.0	261.5	Dolomitized skeletal grainstone with abundant Lepidocyclina sp. larger benthic foraminifers and rare coralline algae and bryozoa. Glauconite present and common toward the base. Coarse grained. Pale gray. Hiatus at top.	Proximal periplatform setting (coarse shed detritus)
IV	IVA					22R-1, 0	33R-1, 0	261.5	367.4	Dolomitized silt-sized and very fine sand skeletal grainstone, homogeneous, lacking internal cyclicity, and strongly bioturbated. Unidentified fine skeletal detritus dominates.	Distal periplatform setting (predominantly silt-sized neritic detritus)
	IVB					33R-1, 0	58R-3, 50	367.4	601.7	Fine sand to silt-sized skeletal packstone/grainstone/wackestone. Unidentifiable fine skeletal detritus dominates. Light and dark colored intervals noted suggesting long-term cyclicity and fluctuating clay content. Graded beds and sharp-based turbidites.	Distal periplatform setting (predominantly silt-sized neritic detritus) or hemipelagic setting (clays with deepening-upward trend)
V						58R-3, 50	64R-1, 40	601.7	656.1	Skeletal grainstone/rudstone rich in benthic foraminifers and branching coralline algae remains. Glauconite is abundant, quartz is present and increases in abundance towards the base. Graded bed units and parallel lamination are common. Cyclicity is well developed.	Proximal periplatform to neritic setting (with oysters at the base)
VI	VIA					64R-1, 40	65R-1, 129	656.1	666.6	Matrix-supported volcaniclastic breccia conglomerate with large angular basalt clasts and a range of altered green-colored volcanic clasts.	Debris flow—marine/continental?
	VIB					65R-1, 129	?	666.6	?	Olivine basalt, medium gray, with olivine phenocrysts and small plagioclase laths, highly altered.	Basement

Unit Subunit Hole 1197A Hole 1197B Description Interpretation

Core, section,
interval (cm) Depth (mbsf) Core, section,
interval (cm) Depth (mbsf)

Top

Base

Top

Base

Top

Base

Top

Base

I
1H-1, 0 7H-2,15 0.0 59.6

Skeletal grainstone and packstone rich in planktonic foraminifers, with bivalves and pteropods as minor components. White to yellow color. Hemipelagic setting, minor cyclicity observed

II
9X-1, 0 ? 59.6 ?

Dolomitized skeletal packstone to grainstone with planktonic foraminifers, abundant larger benthic foraminifers, and neritic material. Fine grained. White to pale gray. Hardground at top. Proximal periplatform setting (fine shed detritus)

II

2R-1, 0 14R-1, 0 59.6 175.0

III

14R-1, 0 22R-1, 0 175.0 261.5 Dolomitized skeletal grainstone with abundant Lepidocyclina sp. larger benthic foraminifers and rare coralline algae and bryozoa. Glauconite present and common toward the base. Coarse grained. Pale gray. Hiatus at top. Proximal periplatform setting (coarse shed detritus)

IV IVA

22R-1, 0 33R-1, 0 261.5 367.4 Dolomitized silt-sized and very fine sand skeletal grainstone, homogeneous, lacking internal cyclicity, and strongly bioturbated. Unidentified fine skeletal detritus dominates. Distal periplatform setting (predominantly silt-sized neritic detritus)

IVB

33R-1, 0 58R-3, 50 367.4 601.7 Fine sand to silt-sized skeletal packstone/grainstone/wackestone. Unidentifiable fine skeletal detritus dominates. Light and dark colored intervals noted suggesting long-term cyclicity and fluctuating clay content. Graded beds and sharp-based turbidites. Distal periplatform setting (predominantly silt-sized neritic detritus) or hemipelagic setting (clays with deepening-upward trend)

V

58R-3, 50 64R-1, 40 601.7 656.1 Skeletal grainstone/rudstone rich in benthic foraminifers and branching coralline algae remains. Glauconite is abundant, quartz is present and increases in abundance towards the base. Graded bed units and parallel lamination are common. Cyclicity is well developed. Proximal periplatform to neritic setting (with oysters at the base)

VI VIA

64R-1, 40 65R-1, 129 656.1 666.6 Matrix-supported volcaniclastic breccia conglomerate with large angular basalt clasts and a range of altered green-colored volcanic clasts. Debris flow—marine/continental?

VIB

65R-1, 129 ? 666.6 ? Olivine basalt, medium gray, with olivine phenocrysts and small plagioclase laths, highly altered. Basement

Note: ? = not defined.