Table T4. Igneous core description log, Hole 801C.

Core,
section		 Piece Analysis* Depth (mbsf)   Interval
(cm)		   Length (cm)   Unit,
subunit		 Lithology Texture Structure Color Comments Chilled margin present
Top Bottom Interval Unit Subunit Top Base
129-801C-

             

 








1R-1 1A-2G
3
493.70 494.94   0-124   124 361
—
 
1
Alkali aphyric microdolerite, sparsely plagioclase phyric basalt Medium to fine grained
Sill
White, speckled gray to black Massive unit no contacts, sparse plagioclase phenocrysts, no vesicles
N
Y
1R-2 1A - 3F
1
494.94 496.30   0-136   136 361
—
 
1
Same as above Same as above Same as above
—
N
Y
1R-3 1A -1G
1
496.30 497.31   0-101   101 361
—
 
1
Same as above Same as above Same as above
—
N
Y
1R-3 2
1
497.31 497.40   101-110   9 398
—
 
2
Sparsely plagioclase, olivine microphyric, aphyric basalt Fine to medium grained, massive
Sill
Brown/gray to speckled gray Diffuse contacts, grain size changes, mineral accumulation
N
Y
1R-4 1-2D
1
497.40 498.55   0-115   115 398
—
 
2
Same as above Same as above Same as above
—
N
Y
1R-5 1A-4B
2
498.55 499.97   0-142   142 398
—
 
2
Same as above Same as above Same as above
—
N
Y
1R-6 1-5
1
499.97 501.29   0-132   132 398
—
 
2
Same as above Same as above Same as above
—
N
Y
2R-1 1A-1F
2
503.00 504.38   0-138   138 344
—
 
3
Sparsely plagioclase phyric to aphyric alkali basalt Fine to glassy, massive
Sill
Gray brown to speckled gray Diffuse contacts, devitrified glassy rim, grain size coarsening downward
Y
N

Notes: * = XRF analysis from Castillo et al. (1992), includes number of analyses per section; — = no data, Y = yes, N = no, XRF = X- ray fluorescence, PP = physical properties, TSB = thin- section billet, *2 = two samples. Cores 129- 801C- 1R to 12R were described in the "Site 801" chapter of the Leg 129 Initial Reports volume (Shipboard Scientific Party, 1990) and modified for consistency downhole during Leg 185 to include some subunits within the existing units. Cores 185- 801C- 13R to 52M are described in this chapter. Only a portion of this table appears here. The complete table is available in ASCII format.