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Table T12. Summary of geophysical measurements.

Site Location Water depth (mbsl) Crustal age (Ma) Chron Spreading rate (km/m.y., half rate) Sediment thickness (m) Heat flow (mW/m2)
SPG-1 23°51.046′S, 165°38.636′W 5697 ~100 34n ? 71
SPG-2 26°03.090′S, 156°53.647′W 5127 ~100 34n ? 17 54
SPG-3 27°56.539′S, 148°35.388′W 4852 70 C31r 33 6 92
SPG-4 26°28.924′S, 137°56.402′W 4285 33.5 C13n 65 10 81
SPG-5 28°26.784′S, 131°23.422′W 4221 24 C7n.1r 71 17 77
SPG-6 27°55.000′S, 123°09.692′W 3738 13.5 C5ABn 85 15 65
SPG-7 27°44.483′S, 117°37.186′W 3688 6.1 C3An.1n 58 <3 36
SPG-9 38°03.690′S, 133°05.507′W 4925 39 C18n.2n 95 20 46
SPG-10 39°18.617′S, 139°48.036′W 5283 58 C25r 28 22 18
SPG-11 41°51.128′S, 153°06.382′W 5076 75 C33n 59 67
SPG-12 45°57.854′S, 163°11.053′W 5306 73 C32n.2n 53 130

Crustal ages determined with Gradstein et al. (2004) geomagnetic polarity timescale. Crustal age for Sites SPG-1 and SPG-2 estimated based on tectonic reconstruction of Larson et al. (2002). ? = unknown, — = no data.

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