SUBJECT INDEX
A

acceleration, vs. time, A4:118

active heave compensator, instruments, A5:17–19

age vs. depth, A1:44–45; A4:89

alteration

basement, A4:33–35

temperature, A4:35

aluminum oxide/(aluminum oxide + iron oxide) ratio, vs. lanthanum/cerium ratio, B1:4; B4:5–7, 19

ammonium

pore water, A4:21

vs. depth, A4:76

anisotropy

anhysteretic remanent magnetization, B9:3–4, 7, 15

magnetic susceptibility, B9:4, 16–19

vs. depth, B9:8, 12

anisotropy, magnetic susceptibility

confidence angle, B9:10

ellipsoids, B9:9, 11

Anomaly M8

paleolatitude, B7:1–20

summary, A1:1–49

Anomaly M21, magnetic inclination, Site 169, B8:6

anoxic environment, lithologic units, A4:15–16

apatite

basalt, A4:29

photomicrograph, A4:102

argon isotopes

radiometric dating, B1:6

volcanic ash, B1:5
B

backarc basins, tectonics, A1:5

bacteria, microbiology, A4:20

barium, vs. depth, B3:7

Barremian, biostratigraphy, A4:20

basalt

chemical composition, A4:145

geochemistry, A4:32–33

isotopes, B3:1–11

lithologic units, A4:27–29

normative composition, A4:146

paleomagnetism, A4:25; B7:1–20; B8:1–27

petrology, A1:14–15

photograph, A1:42

photomicrograph, A4:93, 101–105, 107–108

subdivision, A4:142

Zijderveld plots, A4:88

basalt, aphyric, petrology, A4:26–35

basalt flows

petrology, A4:26–35

photograph, A4:94, 99

basalt flows, altered aphyric, photograph, A4:92

basement

alteration, A4:33–35

igneous rocks, B1:3

lithostratigraphy, A4:91

petrology, A1:14–15

photograph, A4:92

bathymetry, maps, A5:22, 25

bedding, photograph, A4:64

biostratigraphy

Neogene, B1:3–4; B2:1–34

Site 1179, A1:15–16; A4:16–20

vs. depth, A4:74

bioturbation

lithologic units, A4:11–15

photograph, A4:66–67, 71–72

borehole instruments, A4:43–46, 120–132

borehole seismic observatories, A1:3–5; A3:1–58

boreholes, instruments, A4:43–46

breccia

petrology, A1:15; A4:26–35

photograph, A4:96, 98

brecciation, lithologic units, A4:14

Brunhes Chron, magnetostratigraphy, A1:16–17; A4:25

burrows, photograph, A4:67
C

calcite

basalt, A4:33–35

photograph, A4:99–100

photomicrograph, A4:107

calcium. See potassium/calcium ratio

caliper logs

lithologic units, A1:17

vs. depth, A4:115, 117

carbon, organic, pore water, A4:22

carbon, sediments, A4:136–137

carbon dioxide, sediments, A4:22–23

carbonate compensation depth

foraminifers, B1:3

sedimentation, A1:5–6; A4:3

carbonate content, pore water, A4:22

celadonite

basalt, A4:33–35

photomicrograph, A4:107–108

cerium

oxidation, B4:5–7

sediments, B1:4; B4:1–24

spectra, B4:20

See also lanthanum/cerium ratio

chemical composition, basalt, A4:145

chert

lithologic units, A4:14

petrology, A1:14–15

photograph, A1:41; A4:73, 92

Chondrites, lithologic units, A4:11–13

chrome spinel

basalt, A4:28–29

photomicrograph, A4:101

chromium, basalt, A4:32

Chron C1n, magnetostratigraphy, A1:16; A4:25

Chron C1r, magnetostratigraphy, A1:16

Chron C1r.1n, magnetostratigraphy, A1:16

Chron C1r.2r, magnetostratigraphy, A4:25

Chron C1r.2r1n, magnetostratigraphy, A1:16; A4:25

Chron C2Ar, magnetostratigraphy, A1:16

Chron C2n, magnetostratigraphy, A1:16

Chron C2r.1n, magnetostratigraphy, A1:16

Chron C3An, magnetostratigraphy, A1:16

Chron C3n, magnetostratigraphy, A1:16

Chron C3r, magnetostratigraphy, A1:16

Chron C4n.1n, lithologic units, A1:14; A4:12–13

Chron C5Dr, lithologic units, A4:13, 25

Chron C5n.2n, lithologic units, A4:12

clay

lithologic units, A1:14; A4:11–13

Miocene–Pleistocene interval, A1:5–6

sources, A4:16

clay, brown pelagic, photograph, A1:40

clay, diatomrich, photomicrograph, A4:62

clay, ferruginous zeolitic, photomicrograph, A4:62, 68

clay, pelagic

lithologic units, A4:13

permeability, B5:1–16

photograph, A4:72

clay, zeolitic, lithologic units, A4:12–13

clinopyroxene

basalt, A4:27

photomicrograph, A4:102–104

closing force test program, instruments, A5:7

Cobb Mountain Subchron, magnetostratigraphy, A1:16–17; A4:25

colatitude

basalt, B8:8, 20

vs. depth B7:15; B8:14, 16, 18

compressional wave velocity

basalt, A4:153

lithologic units, A1:17

sediments, A4:36–37

split cores, A4:147–148

vs. depth, A4:109

concretions, lithologic units, A4:11

contamination, crust, B3:3

correlation

lithology vs. seismic reflection, A4:39–40

magnetic susceptibility, A4:84

Cretaceous Long Normal Superchron, colatitude, B8:9

Cretaceous, Lower

isotopes, B3:4

lithologic units, A4:15

Cretaceous, middle

magnetic inclination, B8:5–9

paleolatitude, B7:1–20

cristobalite, lithologic units, A4:14

cross laminations, lithologic units, A4:11

crust, basaltic, lithologic units, A4:15

crust, oceanic

basalt, B3:3–4

igneous rocks, B1:5–7

crystallites, plumose, photomicrograph, A4:103
D

demagnetization, alternatingfield

overprinting, B7:5

sediments, A4:24

vector plots, B7:13

demagnetization, thermal

basalt, A4:25

vector plots, B7:14

density

basalt, A4:153

lithologic units, A1:17

vs. depth, A1:46–47; A4:109

density, bulk

sediments, A4:37–38

vs. depth, A4:111

diatoms

biostratigraphy, B1:3, 16; B2:1–34

datum ages, B2:20

lithologic units, A4:10–13

photomicrograph, A4:62

stratigraphic occurrence, B2:14–18

dinoflagellates

biostratigraphy, B1:8

sedimentation rates, A4:26

vs. depth, A4:75

discontinuities, lithologic units, A4:15–16

DM24, instruments, A3:8

downhole measurements, A1:17–18; A4:40–43
E

electrical logs, measurement, A4:42–43
F

feldspar, lithologic units, A4:13

fish teeth, biostratigraphy, A4:18

fissures

basalt, A4:33

photomicrograph, A4:108

foraminifers, benthic, sedimentation rates, A4:26

foraminifers, biostratigraphy, A1:16; A4:17–18
G

gamma rays, multisensor spectral

calibration, B6:3

comparison with conventional logs, B6:1–21

tool specifications, B6:2–3

gamma rays, natural

measurement, A4:42

sediments, A4:39

gammaray logs

lithologic units, A1:17–18; B6:1–21

vs. depth, A4:110, 115–116; B6:13–14

Gauss Chron, magnetostratigraphy, A1:16–17

geochemistry

basalt, A4:32–33

pore water, A4:20–22

sediments, B1:4

Site 1179, A4:20–23

geochronology, volcanic ash, B1:5, 17

geology, tectonics, A4:2–3

Gilbert Chron, magnetostratigraphy, A1:16–17

glass shards, photograph, A4:100

goethite, basalt, A4:34

grain size, permeability, B5:5–6, 12

Granularia, lithologic units, A4:11–14

groundmass, basalt, A4:27

groundmass texture, photomicrograph, A4:103, 105

Guralp compressed format, instruments, A3:9–11, 51
H

haloes, basalt, A4:29

hammer/bit testing, instruments, A5:6–7

hardrock reentry system, instruments, A1:7–8; A5:5–47

heat flow, sediments, A4:38

heave, acceleration, A4:119

Helminthopsis, lithologic units, A4:11

hematite, basalt, A4:34

hematite, collomorphic, photomicrograph, A4:108

Holocene. See Miocene–Holocene interval

hyaloclastite

lithologic units, A4:27–29

photograph, A4:96, 98

photomicrograph, A4:107

hyalopilitic texture

basalt, A4:30–32

photomicrograph, A4:103

hydration, volcanic glass, A4:33

hydril pulsation dampner, instruments, A5:17

hydrogen

pore water, A4:22

sediments, A4:136–137
I

iddingsite

petrology, A1:15

photomicrograph, A4:101

igneous petrology, A1:14–15; A4:26–35

igneous rocks

isotope geochemistry, B1:5–7

lithologic units, A1:43

illite, lithologic units, A4:11–12

index properties, discrete samples, A4:149–151

instruments

boreholes, A4:43–46

deployment, A1:10; A4:158

hardrock reentry system, A1:7–8

ocean borehole seismometers, A3:6–8

power supply, A3:15–19

seismic observatories, A1:3–5, 7–8; A3:1–58

interpillow material, photograph, A4:95–96, 100

Inutile Seamount, bathymetry maps, A5:22

iron, pore water, A4:21–22

iron oxide

lithologic units, A4:13

See also aluminum oxide/(aluminum oxide + iron oxide) ratio

iron oxide/magnesium oxide ratio, vs. titanium oxide, A4:32, 106

isotopes, basalt, B3:1–11
J

Japan, tectonics, A1:5

Jaramillo Subchron, magnetostratigraphy, A1:16–17
K

Kuroshio Current, circulation, B1:2
L

laminations, lithologic units, A4:11, 15

laminations, planar, photograph, A4:65

lanthanum/cerium ratio

sediments, B4:5

vs. aluminum oxide/(aluminum oxide + iron oxide) ratio, B1:4; B4:5–7, 19

vs. depth, B4:21

lava flows, petrology, A4:31–33

liesegang structures, photograph, A4:94

limestone, photograph, A4:95

lithologic units

basalt, A4:27–29

igneous rocks, A1:43

Site 1179, A1:14; A4:10–16

Unit I, A4:10–12

Unit II, A4:12–13

Unit III, A4:13–14

Unit IV, A4:14

Unit V, A4:15

lithology, vs. seismic reflection, A4:39–40

lithostratigraphy

basement, A4:91

correlation, A1:26; A1:34–36; A4:54, 61

summary, B5:11
M

magnetic inclination

basalt, B7:6–8; B8:5–9

vs. depth, A4:81, 85–87

magnetic intensity

basalt, A4:25

sediments, A4:24–25

vs. depth, A4:80

magnetic lineaments, tectonics, A1:25, 32; A4:53

magnetic polarity

basalt, Site 800, B8:8

reversal boundary depths, A4:141

reversals, A4:85–87

magnetic susceptibility

anisotropy, B9:4

correlation, A4:84

sediments, A4:24–25, 39

tie point depths, A4:140

vs. depth, A4:83–84, 110

magnetite

basalt, A4:30–32

photomicrograph, A4:102–103

magnetostratigraphy, chrons, A1:16–17; A4:25

major elements, sediments, B4:23

manganese

oxidation, B4:3–5

pore water, A4:21–22

sediments, B1:4; B4:1–24

spectra, B4:13

vs. depth, A4:77; B4:12, 14

manganese oxide/titanium oxide ratio

oxidation, B4:4–5

vs. depth, B4:16

vs. distance from land, B4:15

mantle plumes, petrology, A4:31

Mariana Arc, tectonics, A1:5

Mariana backarc, operations, A5:15–16

Mariana Trough, tectonics, A1:5

Martillo Seamount, bathymetry maps, A5:25

Matuyama Chron, magnetostratigraphy, A1:16–17; A4:25

medium induction spherically focused resistivity logs, vs. depth, A4:117

MEG191, instruments, A3:9–13, 53

mesostasis, basalt, A4:27

Messinian, chronology, B1:8

microbiology

core samples, A4:139

incubation, A4:22–23

perfluorocarbon tracers, A4:23

Site 1179, A1:18; A4:22–23

microcrystalline texture

basalt, A4:30–32

photomicrograph, A4:102, 104

Miocene

biostratigraphy, A1:16

volcanism, B1:8

Miocene, middle/upper boundary, magnetostratigraphy, A1:16

Miocene, upper

biostratigraphy, A4:16–20; B2:1–34

lithologic units, A4:10–13

Miocene–Holocene interval, lithologic units, A4:10–12

Miocene–Pleistocene interval, sedimentation, A1:5–6

Miocene/Pliocene boundary

diatoms, B2:6

magnetostratigraphy, A1:16
N

nannofossils, biostratigraphy, A1:16

nannofossils, calcareous

biostratigraphy, A4:17

sedimentation rates, A4:26

neodymium, vs. titanium oxide, B4:18

neodymium isotopes

basalt, B3:1–11

vs. depth, B3:7

vs. strontium isotopes, B1:5–6, 17; B3:9

Neogene

biostratigraphy, A4:16–20

sediments, B1:2–19

NEREID191 system, deployment, A3:2–3, 23, 50–51; A4:159

nickel, basalt, A4:32

niobium. See zirconium/niobium ratio

nitrogen

pore water, A4:22

sediments, A4:136–137

nodules, lithologic units, A4:11

normative composition, basalt, A4:146
O

ocean borehole seismometers, instruments, A3:6–8, 31–48

Olduvai Subchron, magnetostratigraphy, A1:16–17

olivine

basalt, A4:27–35

petrology, A1:15

photomicrograph, A4:101, 108

onshore quarry testing program, instruments, A5:9–10

Ontong Java, magma sources, B3:4

ooze

lithologic units, A1:14

Miocene–Pleistocene interval, A1:5–6

ooze, diatom

photograph, A4:63–67, 69

photomicrograph, A4:62

ooze, diatombearing radiolarian

lithologic units, A4:10–13

photograph, A1:39

ooze, diatomaceous

permeability, B5:1–16

photograph, A1:38

ooze, radiolarian

photograph, A4:70

photomicrograph, A4:62

ooze, siliceous, lithologic units, A4:15

Ophiomorphia

lithologic units, A4:11–12

photograph, A4:67

oxidation

cerium, B4:5–7

sediments, B1:4; B4:1–24

Oyashio Current, circulation, B1:2
P

Pacific Ocean NW

stratigraphy, A4:3

summary, A1:1–49

Pacific Ocean W, paleomagnetism, B8:1–27

Pacific Plate

paleolatitude, B7:1–20

tectonics, A1:5

Pacific–Izanagi Ridge, basalt, B3:4

palagonite

basalt, A4:27

basalt distribution, A4:144

petrology, A1:15

photomicrograph, A4:102

paleoceanography, Neogene, B1:3–4

paleoclimatology, sedimentation rates, B1:5

paleolatitude

comparison with other Pacific basalt data, B7:16

Pacific Plate, B7:1–20

See also colatitude

paleomagnetic pole, paleolatitude, B7:1–20

paleomagnetism

basalt, A4:25; B7:1–20; B8:1–27

data, B1:6–7

Pacific Ocean W, B8:1–27

sediments, A4:24–25; B9:1–19

Site 1179, A1:16–17; A4:23–25

palynomorphs, biostratigraphy, A1:15; A4:18–19

perfluorocarbon tracer, log–log curve, A4:79

permeability

diatomaceous sediments and pelagic clay, B5:1–16

vs. porosity, B5:15

vs. pressure, B5:14

phenocrysts

basalt, A4:27–35

basalt distribution, A4:143

photomicrograph, A4:101

Philippine Sea plate, tectonics, A1:5

phillipsite, lithologic units, A4:13

Phycosiphon, lithologic units, A4:11, 13–14

physical properties

average by lithologic unit, A4:154

sediments, B1:2

Site 1179, A1:17; A4:35–40

pillow rims, chilled, basalt, A4:29

pillow structure, photograph, A4:95

pillows

petrology, A4:26–35

photograph, A4:100

plagioclase

basalt, A4:27–35

photomicrograph, A4:101, 103–105, 108

Planolites, lithologic units, A4:11–14

Pleistocene

biostratigraphy, B1:8; B2:1–34

See also Miocene–Holocene interval; Miocene–Pleistocene interval

Pliocene

biostratigraphy, A4:19–20; B2:1–34

See also Miocene–Holocene interval; Miocene–Pleistocene interval; Miocene/Pliocene boundary

porcellanite, lithologic units, A4:14

pore water, geochemistry, A4:20–22

porosity

lithologic units, A1:17

sediments, A4:37–38

vs. depth, A1:46–47; A4:109

vs. permeability, B5:15

potassium, radioactivity, A4:42

potassium/calcium ratio, alteration, B1:6

potassium logs

comparison of multisensor tool with conventional, B6:5–6

vs. depth, A4:115; B6:15

potassium oxide, vs. depth, B3:7

power supply, instruments, A3:15–19

pressure

permeability, B5:13

vs. permeability in Navajo Sandstone, B5:14

pyrite, basalt, A4:34
Q

quartz, lithologic units, A4:11–12

Quaternary, biostratigraphy, A4:16–20

quenched margins, basalt, A4:30–32
R

radioactivity, natural, operations, A4:42

radioactivity logs, vs. depth, A4:117

radiolarians

abundance, A4:138

biostratigraphy, A4:19–20; B1:8

lithologic units, A4:10–12, 15–16

photomicrograph, A4:97

sedimentation rates, A4:26, 90

radiometric dating, argon isotopes, B1:6

rare earths

basalt, A4:32

postArchean shales from Australia comparison, B4:17

sediments, B4:5–7, 24

reflection, traveltime vs. lithology, A4:156–157

remanent magnetization, anhysteretic

overprinting, B7:5

sediments, B9:3–4, 7

remanent magnetization, characteristic

colatitude, Site 803, B8:9

sediments, A4:24

remanent magnetization, isothermal

basalt, A4:25

overprinting, B7:5

sediments, B9:2–3, 13–14

remanent magnetization, natural, basalt, B8:5–9

resilification, lithologic units, A4:14

resistivity logs

lithologic units, A1:17

measurement, A4:42–43

vs. depth, A4:117

See also medium induction spherically focused resistivity logs; shallow induction spherically focused resistivity logs

rosettelike bundles, photomicrograph, A4:104

Rota, tectonics, A1:5

Rota1, operations, A5:13–15

rubidium, vs. depth, B3:7

rubidium/strontium ratio

vs. depth, B3:7

vs. strontium isotopes, B3:8
S

SAM191, instruments, A3:13–15, 49

saponite

photograph, A4:99

See also smectite/saponite mixture

seafloor instruments, A4:45–46

secondary minerals

petrology, A1:15

photograph, A4:69

photomicrograph, A4:68, 102, 107–108

sedimentary lithology, A1:14

sedimentation

carbonate compensation depth, A1:5–6

Miocene–Pleistocene interval, A1:5–6

provenance, B4:7, 22

sedimentation rates

age vs. depth, A1:44–45; A4:89

biostratigraphy, A4:26

magnetostratigraphy, A1:16–17

paleoclimatology, B1:5

paleomagnetism, A4:26

radiolarians, A4:90

Site 1179, A4:25–26

sedimentology, A4:9–16

sediments

composition, B1:3–5

geochemistry, B1:4; B4:1–24

Neogene, B1:2–19

paleomagnetism, A4:24–25; B9:1–19

seismic observatories

installation, A1:11–12, 27–31; A3:4–6, 23–58

Pacific Ocean NW, A1:3–5, 7–8, 27–31; A3:1–58

See also borehole seismic observatories

seismic profiles

Site 1179, A1:37; A4:56–60, 113–114

Site 1180, A5:23

Site 1181, A5:24

Site 1182, A5:26

vs. lithology, A4:39–40

seismic stratigraphy, A4:8–9

seismometers

data, B1:7–8

emplacement, A4:44–45

See also borehole seismic observatories; ocean borehole seismometers

shallow induction spherically focused resistivity logs, vs. depth, A4:117

Shatsky Rise

crust, B3:3

diatoms, B2:7

tectonics, A1:5

shear strength, peak, vs. depth, A4:112

shear strength, vane, sediments, A4:39, 155

silica, skeletons, lithologic units, A4:15

siliceous microfossils, biostratigraphy, A1:15

silicoflagellates, lithologic units, A4:11–12

Site 169, paleomagnetism, B8:2, 5–6

Site 170, paleomagnetism, B8:2, 6

Site 171, paleomagnetism, B8:2, 6–7

Site 581, paleomagnetism, B8:2–3, 7, 21–22

Site 597, paleomagnetism, B8:3, 7–8, 23–25

Site 800, paleomagnetism, B8:3, 8, 26–27

Site 803, paleomagnetism, B8:4, 9, 26–27

Site 865, paleomagnetism, B8:4, 9, 26–27

Site 1179, A4:1–159

background and objectives, A4:1–2

biostratigraphy, A1:15–16; A4:16–20; B2:1–34

borehole instruments, A4:43–46

coring summary, A4:133–135

downhole measurements, A1:17–18; A4:40–43; B6:1–21

geochemistry, A4:20–23; B4:1–24

geology and tectonics, A4:2–3

igneous petrology, A1:14–15; A4:26–35

isotope geochemistry, B3:1–11

lithostratigraphy, A1:26, 34–36; B1:12–13

microbiology, A1:18; A4:22–23

operations, A1:7–12, 48–49; A4:3–7

paleomagnetism, A1:16–17; A4:23–25; B7:1–20

permeability, B5:1–16

physical properties, A1:17; A4:35–40

sedimentary lithology, A1:14

sedimentation rates, A4:25–26

sedimentology, A4:9–16

seismic stratigraphy, A4:8–9

site description, A4:1–159

site geophysics, A4:7–9

synthesis, B1:1–19

Site 1180, A5:1–47

background and objectives, A5:1–2

operations, A1:12–13; A5:2–3

site description, A5:1–47

site geophysics, A5:3

Site 1181, A5:1–47

background and objectives, A5:1–2

operations, A1:12–13; A5:2–3

site description, A5:1–47

site geophysics, A5:3

Site 1182, A5:1–47

background and objectives, A5:3–4

Mariana backarc operations, A5:15–16

operations, A5:4

site description, A5:1–47

site geophysics, A5:4–5

site geophysics

Site 1179, A4:7–9

Site 1180, A5:3

Site 1181, A5:3

Site 1182, A5:4–5

smectite, photomicrograph, A4:107–108

smectite/saponite mixture, basalt, A4:33–35

sponges, lithologic units, A4:11–12

spreading centers, tectonics, A1:5

standpipe vibration, instruments, A5:16

stratigraphy, tectonics, A4:3

strontium

basalt, A4:32

vs. depth, B3:7

See also rubidium/strontium ratio

strontium isotopes

basalt, B3:1–11

vs. depth, B3:7

vs. neodymium isotopes, B1:5–6, 17; B3:9

vs. rubidium/strontium ratio, B3:8

subduction factory, volcanic ash, B1:5

subophitic texture

petrology, A1:15

photomicrograph, A4:104–105

sulfate

pore water, A4:22

vs. depth, A4:78; B4:12

sulfur

pore water, A4:22

sediments, A4:136–137
T

tectonics

geology, A4:2–3

volcanism, A1:5

Teichichnus, lithologic units, A4:11–12

temperature, alteration, A4:35

thermal conductivity

sediments, A4:152

vs. depth, A4:110

thermal conductivity, sediments, A4:38

thorium, radioactivity, A4:42

thorium logs

comparison of multisensor tool with conventional, B6:5–6

vs. depth, A4:115; B6:17

tie point depths, magnetic susceptibility, A4:140

titanium oxide

vs. iron oxide/magnesium oxide ratio, A4:32, 106

vs. neodymium, B4:18

See also manganese oxide/titanium oxide ratio

trace elements

basalt, B3:11

vs. depth, B3:7

triple junctions, tectonics, A1:5
U

uranium, radioactivity, A4:42

uranium logs

comparison of multisensor tool with conventional, B6:5–6

vs. depth, A4:115; B6:16
V

Valanginian, biostratigraphy, A4:20

veins, photomicrograph, A4:107

velocity

vs. depth, A1:46–47

See also compressional wave velocity

velocity, sonic, sediments, A4:36–37

vesicles

basalt, A4:30–32

photograph, A4:99

photomicrograph, A4:107–108

volcanic ash

chronology, B1:5, 17

lithologic units, A4:11–12, 16

Miocene–Pleistocene interval, A1:5–6

photograph, A4:69

volcanic glass

basalt distribution, A4:144

hydration, A4:33

lithologic units, A4:13, 16

petrology, A1:15

photomicrograph, A4:68

volcanic glass, devitrified, basalt, A4:27

volcaniclastics

basalt, A4:28–35

photograph, A4:96

volcanism

Miocene, B1:8

tectonics, A1:5

vugs, lithologic units, A4:14
W

welllogging

data, B1:7

drillstring acceleration measurement tool, A4:43

operations, A4:40–46

WP2 observatory, operation, A3:19–20
Y

yttrium. See zirconium/yttrium ratio
Z

zeolite

lithologic units, A4:11–12

photomicrograph, A4:107

Zijderveld plots

basalt, A4:25, 88; B8:12–13, 15, 17

magnetic properties, A4:82, 88

zircon

basalt, A4:29–30

photomicrograph, A4:102

zirconium/niobium ratio, vs. zirconium/yttrium ratio, B3:10

zirconium/yttrium ratio

basalt, B3:4

vs. zirconium/niobium ratio, B3:10

zonation, diatoms, B2:3–34

Zoophycos, lithologic units, A4:11