Table T5. Example alteration log.
Hole
Core
Section
Piece
Top
(cm)
Base
(cm)
Length
(cm)
Core-top
depth
(mbsf)
Rock color/alteration type (%)
Glass (%)
Vesicles
Dark gray
Brown
Black halo
Light gray
Mixed halo
Dark patch
Blue green
gl
alt glass
(%)
Minerals
Comments
1256B 29X 1 3 7 12 5 250.7 100





3 50 2 sap, py, cc
1256C 4R 1 5 24 29 5 245.0 100





0
1 sap, py
1256C 4R 1 6 29 35 6 245.0 100





0
1 sap, py
1256C 4R 1 7 36 38 2 245.0 100





0
1 sap, py
1256C 4R 1 8 40 57 17 245.0 100





0
1 sap, py
1256C 5R 1 1 0 3 3 252.4 100










1256C 5R 1 2 4 51 47 252.4 100










1256C 5R 1 3 53 58 5 252.4 100










1256C 5R 1 4 60 65 5 252.4 100










1256C 5R 1 5 65 68 3 252.4 100










1256C 5R 1 6 68 71 3 252.4 100










1256C 5R 1 7 71 74 3 252.4 100










1256C 5R 1 8 75 78 3 252.4 100










1256C 5R 1 9 78 99 21 252.4 100










Notes: gl = glass, alt glass = altered glass. sap = saponite, py = pyrite, cc = calcium carbonate. Only a portion of this table appears here. The entire table is available in ASCII.