Paleomagnetism and related topics
The table below is an an effort to pull together some of the varied information related to paleomagnetism and related topics (absolute age dating, oceanic features). Some of this is relevant to the on-going exercise; some is just for fun!
| Year | Land-based Paleomagnetics | Marine Paleomagetics | Radiometric Age Dating | Ocean Basins | Gravity |
| 1040 | Chines measure magnetic field | ||||
| 15-16th c | Declination and inclination of mag field recognized | ||||
| 1710 | Halley: secular variation | ||||
| late 18th c | Coulumb: instrument to measure mag field | ||||
| early 19th c | Gauss: mathematics of mag field | ||||
| 1838 | Mag field measured in Paris and London | ||||
| 1895 | Curie: remnant mag in coole rocks | ||||
| 1906 | Brunhes: experiments with bricks demonstrate remnant mag | ||||
| 1910-15 | Isostatic equilibr of continents | ||||
| 1911 | Holmes’ first time scale | ||||
| 1926 | Mercanton: Currie Pt. | Land Bridges (also later) | |||
| 1929 | Matuyama: mag reversals | ||||
| 1930s | Du Toit: geology of Gondwana continents | Hess: negative gravity anomaly over trenches | |||
| 1939-1947 | Elsesser: Dynamo model of magn field | ||||
| 1947 | Blackett: suggests magn field related to rotation | ||||
| 1947-1951 | Blackett: develops improved magnetometer to measure weak fields | ||||
| 1947-1960 | Holmes refined time scales | ||||
| 1950 | Uyeda: reversed magn signal preserved | ||||
| 1950s | Sea floor topography mapped | ||||
| 1953 | Lamont grp: recognized marine anomalies in the Atlantic | ||||
| 1954 | Clegg, Almond, Stubbs: first polar wandering curve; Creer, Irving, Runcorn: curve for older rocks | Rothe: earthquake epicenters in oceans | |||
| 1955 | Menard: recognizes Mendocino and Murray fracture zones off California based on topography | ||||
| 1956 | Runcorn: compares polar wandering curves for North Amer and Europe | Lamont grp: ocean crust ~6km thick | |||
| 1957 | Lamont grp: recognized positive marine anomalies along Atlantic MOR; Girdler: postiive magnetic anomaly in Red Sea | Girdler: negative gravity anomaly in Red Sea | |||
| 1958 | Mason and Raff: first map of magn anomalies in northeast Pacific | Menard notes association of earthquakes with some margins; Bullard: heat flow at MOR is 5-6x rest of ocean | |||
| 1959 | Vacquier: fracture zones offset magn anomalies in Pacific | ||||
| 1959-62 | Hess: “geopoetry” | ||||
| 1960 | Reynolds: High-resolution mass spec K/Ar dates | ||||
| 1961 | Dietz: suggests sea-floor spreading | ||||
| 1963 | Cox, Doell, Dalrymple: first paleomagetic time scale | ||||
| 1963-68 | Rapid development of paleomagnetic time scale |