tab delimited contribution id version timestamp contributor data_model_version reference description 13216 3 2006-12-20T10:48:42.000Z @magic 3.0 10.1016/0031-9201(90)90039-Z Upgraded to MagIC Data Model 3.0 by the MagIC Database Team >>>>>>>>>> tab delimited locations location location_type result_name result_type method_codes citations geologic_classes lithologies geological_province_sections lat_s lat_n lon_w lon_e continent_ocean country region age_low age_high age_unit dir_tilt_correction dir_dec dir_inc dir_alpha95 dir_k dir_n_sites dir_n_samples fold_test conglomerate_test contact_test reversal_test pole_lat pole_lon pole_dp pole_dm pole_reversed_perc description rock_magnetic_test Chichinautzin Formation Outcrop 6283 a DE-VGP : LT-AF-Z:LP-DC3 This study Extrusive Extrusives Chichinautzin Formation 19 19 251 251 North America Mexico Mexico 0 1 Ma 0 359.2 28.3 3 35 68 503 ND ND ND ND 87.9 95.1 2.6 2.6 0 Brunhes age. Combined Result. AF cleaning various. IRM (sat. 0. 1T). Supersedes and includes data from RESULTNOS 1238, 2849. M >>>>>>>>>> tab delimited ages location age_low age_high age_unit timescale_eon timescale_era timescale_period timescale_epoch description method_codes timescale_citations citations Chichinautzin Formation 0 1 Ma Phanerozoic Cenozoic Neogene Pleistocene : Holocene C14 and K-Ar ages 0 to 0. 58 Ma. GM-C14:GM-KAR Gradstein et al. 2004 This study