Table T11. Inclination-only averages for lithologic units, Site U1377.
|
Strat.
unit |
Lith. unit |
ISCI
|
Lithology
|
Lith. unit depth (mbsf)
|
Averages from 2 cm archive-half core data
|
Averages from Fisher piece averages | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
n
|
Inclination (°) |
α63
|
α95
|
n
|
Inclination (°) |
α63
|
α95
|
||||||||
|
Arithmetic mean |
Maximum likelihood |
Arithmetic mean |
Maximum likelihood |
||||||||||||
|
Top
|
Bottom
|
||||||||||||||
| 330-U1377A- | |||||||||||||||
| I | — | NA | Sediment | 0.00 | 0.03 | ||||||||||
| II | — | NA | Sediment | 6.10 | 6.24 | ||||||||||
| III | 1 | 2 | Lava body or intrusive sheet | 15.10 | 16.58 | 1 | 63.6 | 1 | 63.6 | ||||||
| III | 2 | 0 | Lava body | 16.58 | 16.75 | ||||||||||
| III | 3 | 3 | Lava lobes stack or pillow stack | 24.50 | 44.86 | 21 | 55.0 | 58.2 | 20.3 | 8.2 | 6 | 55.2 | 59.6 | 23.4 | 20.0 |
| III | 4 | 1 | Lava lobes stack or pillow stack | 44.86 | 45.21 | ||||||||||
| III | 5 | 3 | Lava lobes stack or pillow stack | 45.21 | 47.20 | 40 | 67.7 | 69.0 | 10.3 | 2.9 | 6 | 64.2 | 64.8 | 8.5 | 7.1 |
| III | 6 | NA | Lava lobes stack or pillow stack | 47.20 | 47.46 | 1 | 1.4 | 1 | 1.4 | ||||||
| 330-U1377B- | |||||||||||||||
| I | — | NA | Sediment | 0.00 | 0.79 | ||||||||||
| II | — | NA | Sediment | 0.79 | 1.08 | ||||||||||
| III | 1 | 3 | Lava lobes or pillows | 9.10 | 19.21 | 21 | 79.3 | 80.2 | 5.7 | 2.2 | 6 | 80.8 | 81.4 | 4.3 | 3.6 |
| III | 2 | 3 | Lava lobes or pillows | 19.21 | 21.29 | 11 | 68.6 | 69.2 | 7.4 | 4.2 | |||||
| III | 3 | 3 | Pillows | 21.29 | 21.41 | 2 | 67.4 | 67.6 | 4.5 | 13.8 | |||||
| III | 4 | 3 | Pillows | 21.41 | 21.48 | 1 | 49.3 | 1 | 68.1 | ||||||
| III | 5 | 3 | Pillows | 21.48 | 21.60 | 1 | 52.1 | 1 | 52.1 | ||||||
| III | 6 | 3 | Lava lobes or pillows | 21.60 | 22.78 | 30 | 56.2 | 56.6 | 7.6 | 2.5 | 1 | 57.3 | |||
| III | 7 | NA | Brecciated base of Unit 6 | 22.78 | 22.99 | 1 | 61.9 | 1 | 52.9 | ||||||
| III | 8 | NA | Possible break out of Unit 9? | 22.99 | 23.24 | ||||||||||
| III | 9 | 3 | Lava lobes or pillows | 23.24 | 24.63 | 42 | 67.2 | 68.3 | 10.0 | 2.8 | 4 | 66.4 | 66.4 | 2.0 | 2.3 |
| III | 10 | NA | Fragmented lava | 24.63 | 25.47 | 7 | 44.8 | 74.4 | 48.0 | 42.3 | 5* | ||||
| III | 11 | 3 | Pillows | 27.50 | 28.19 | 11 | 79.7 | 80.7 | 6.0 | 3.4 | 2 | 82.8 | 82.9 | 1.7 | 5.3 |
| III | 12 | 3 | Intrusive lava in interpillow voids (break out) | 28.19 | 28.43 | ||||||||||
| III | 13 | 3 | Pillows | 28.43 | 28.67 | 5 | 68.4 | 68.6 | 3.7 | 3.5 | |||||
| III | 14 | 3 | Pillows | 28.67 | 29.62 | 4 | 72.2 | 72.5 | 4.7 | 5.3 | 1 | 75.2 | |||
| III | 15 | NA | Brecciated interval | 29.62 | 29.80 | ||||||||||
| III | 16 | NA | Pillows | 29.80 | 30.03 | 2 | 41.2 | 41.2 | 2.5 | 7.9 | |||||
| III | 17 | 3 | Lava body with glassy margin, seems intrusive into Unit 16 | 30.03 | 30.54 | 7 | 40.9 | 41.1 | 6.5 | 4.9 | 2 | 44.1 | 44.1 | 1.3 | 4.1 |
| III | 18 | 3 | Pillows | 30.54 | 31.98 | 11 | 62.4 | 66.1 | 18.0 | 10.4 | 4 | 51.4 | 53.4 | 18.1 | 21.0 |
* = no solution possible. — = no lithologic unit. ISCI = in situ confidence index (see “Igneous petrology and volcanology” in the “Methods” chapter [Expedition 330 Scientists, 2012a]). NA = not applicable. The method of Arason and Levi (2010) was used to calculate inclination-only mean and associated statistics. α63 = circular standard deviation, α95 = 95% confidence angle.
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