 | Praediscosphaera columnata Aube, France Aptian 121.4 113.0 ± 1.0 base: magnetic anomaly M0r Apt, France Barremian 125.77 ± 1.5 121.4 ± 1.0 base: first occurrence... 91 KB (9,487 words) - 05:50, 24 April 2024 |
 | Alcide d'Orbigny in 1840. The base of the Aptian Stage is laid at magnetic anomaly M0r. A global reference profile for the base (a GSSP) had in 2009 not... 10 KB (821 words) - 20:34, 28 February 2024 |
Magnetostratigraphy (redirect from Rock magnetics) inserted (or if not validated, removed). The two standardised marine magnetic anomalies sequences are the "C-sequence" and "M-sequence" and cover from the... 13 KB (1,626 words) - 15:52, 7 December 2023 |