Table T3. Age of polarity transitions (Ogg, 2012); minimum, midpoint, and maximum CCSF-A depths of reversal boundaries in Holes U1396A–U1396C; and calculated sedimentation rate based on the midpoint depth using the CCSF-B depth scale.
|
Polarity zone |
Age Ogg (2012) (Ma) |
Top depth CCSF-A (m) |
Midpoint depth CCSF-A (m) |
Bottom depth CCSF-A (m) |
CCSF-B Sed. rate (midpoint) (m/My) |
|---|---|---|---|---|---|
| 340-U1396A- | |||||
| C1n (B) Brunhes/Matuyama | 0.781 | 12.35* | 12.51* | 12.67* | 14.49 |
| C1r.1n (T) Jaramillo | 0.988 | 17.79 | 17.88 | 17.97 | 23.33 |
| C1r.1n (B) Jaramillo | 1.072 | 20.80 | 20.94 | 21.08 | 32.92 |
| C2n (T) Olduvai | 1.778 | 34.30 | 34.35 | 34.40 | 17.17 |
| C2n (B) Olduvai | 1.945 | 39.36 | 39.56 | 39.76 | 28.19 |
| C2r.1n (T) Reunion | 2.128 | 43.97 | 44.10 | 44.23 | 22.42 |
| C2r.1n (B) Reunion | 2.148 | 45.16 | 45.21 | 45.26 | 50.16 |
| C2r.2r (B) Gauss/Matuyama | 2.581 | 61.44 | 61.58 | 61.72 | 34.17 |
| C2An.1r (T) Keana | 3.032 | 80.61 | 80.67 | 80.73 | 38.25 |
| C2An.1r (B) Keana | 3.116 | 82.14 | 82.23 | 82.32 | 16.78 |
| C2An.2r (T) Mammoth | 3.207 | 85.32 | 85.38 | 85.44 | 31.28 |
| C2An.2r (B) Mammoth | 3.330 | 89.64 | 89.70 | 89.76 | 31.74 |
| C2An.3n (B) Gilbert/Gauss | 3.596 | 101.62 | 101.67 | 101.72 | 40.67 |
| C3n.1n (T) Cochiti | 4.187 | 137.29 | 137.67 | 138.05 | 55.05 |
| C3n.1n (B) Cochiti | 4.300 | 143.57 | 143.61 | 143.65 | 47.50 |
| 340-U1396C- | |||||
| C1n (B) Brunhes/Matuyama | 0.781 | 12.67 | 12.69 | 12.72 | 14.68 |
| C1r.1n (T) Jaramillo | 0.988 | 17.74 | 17.79 | 17.84 | 22.27 |
| C1r.1n (B) Jaramillo | 1.072 | 20.65 | 20.80 | 20.95 | 32.38 |
| C2n (T) Olduvai | 1.778 | 34.00 | 34.30 | 34.60 | 17.28 |
| C2n (B) Olduvai | 1.945 | 39.31 | 39.40 | 39.49 | 27.60 |
| C2r.1n (T) Reunion | 2.128 | 44.10 | 44.19 | 44.28 | 23.65 |
| C2r.1n (B) Reunion | 2.148 | 44.99 | 45.11 | 45.24 | 41.57 |
| C2r.2r (B) Gauss/Matuyama | 2.581 | 61.48 | 61.59 | 61.70 | 34.39 |
| C2An.1r (T) Keana | 3.032 | 79.84 | 79.89 | 79.94 | 36.67 |
| C2An.1r (B) Keana | 3.116 | 82.24 | 82.25 | 82.26 | 25.39 |
| C2An.2r (T) Mammoth | 3.207 | 85.18 | 85.29 | 85.40 | 30.19 |
| C2An.2r (B) Mammoth | 3.330 | 89.54 | 89.78 | 90.02 | 32.99 |
| C2An.3n (B) Gilbert/Gauss | 3.596 | 101.57 | 101.84 | 102.12 | 40.97 |
| C3n.1n (T) Cochiti | 4.187 | 137.43 | 137.55 | 137.68 | 54.60 |
| C3n.1n (B) Cochiti | 4.300 | 143.48 | 143.67 | 143.86 | 48.94 |
| C3n.2n (T) Nunivak | 4.493 | 151.61 | 151.86 | 152.11 | 38.35 |
* = depths reported from Hole U1396B not Hole U1396A. Maximum depth = last point that stable polarity was defined before entering a transitional stage, minimum depths = first stable polarity after the magnetic reversal, midpoint = average of the two. B = base of transition, T = top of transition. The CCSF-B depths of these horizons can be calculated using the regression in Figure F5.
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