tab contribution id doi version timestamp magic_version contributor author description 6397 10.1016/S0040-1951(01)00032-4 2 2006-12-22T02:12:28.000Z 2.2 @magic >>>>>>>>>> tab delimited er_locations er_location_name location_type location_begin_lat location_begin_lon location_end_lat location_end_lon continent_ocean country region terrane geological_province_section location_class location_lithology location_description er_citation_names Brito Formation Outcrop 11.4 274 11.4 274 North America Nicaragua Nicaragua Pacific Coastal Plain Brito Formation Sedimentary Sandstone : shales Eocene. This study Coyol Group Outcrop 12.5 274.7 12.5 274.7 North America Nicaragua Nicaragua Nicaraguan Highland Coyol Group Extrusive : Intrusive Basalt : Dacite Miocene. This study La Batea Formation Outcrop 12 275.3 12 275.3 North America Nicaragua Nicaragua Nicaraguan Highland La Batea Formation Extrusive : Intrusive Basalt : andesit Miocene. This study Matagalpa Group, sites 13,14 Outcrop 12.4 274.8 12.4 274.8 North America Nicaragua Nicaragua Nicaraguan Highland Matagalpa Group Extrusive Basalt Oligocene. This study Matagalpa Group, sites 8,9,12 Outcrop 12.7 274.6 12.7 274.6 North America Nicaragua Nicaragua Nicaraguan Highland Matagalpa Group Extrusive Basalt Oligocene - Miocene. This study Rivas Basic Intrusions Outcrop 11.4 274.1 11.4 274.1 North America Nicaragua Nicaragua Pacific Coastal Plain Rivas Basic Intrusions Intrusive basic dyke : sill Upper Cretaceous - Lower Eocene. This study Tamarindo Formation Outcrop 12.3 273.2 12.3 273.2 North America Nicaragua Nicaragua Pacific Coastal Plain Tamarindo Formation Extrusive Basalt : Andesite Miocene. This study >>>>>>>>>> tab delimited er_ages er_location_name age_range_low age_range_high age_unit timescale_eon timescale_era timescale_period timescale_epoch age_description magic_method_codes er_timescale_citation_names er_citation_names Coyol Group 16 20 Ma Phanerozoic Cenozoic Neogene Miocene 40Ar/39Ar plateau age 18. 46+/-0. 37 Ma, estim. mean age 18 Ma. GM-ARAR-AP : GM-KAR Gradstein et al. 2004 This study La Batea Formation 18 22 Ma Phanerozoic Cenozoic Neogene Miocene 40Ar/39Ar ages 19. 6-23. 9 Ma, estimated mean age 20 Ma. GM-ARAR : GM-KAR Gradstein et al. 2004 This study Matagalpa Group, sites 8,9,12 22 26 Ma Phanerozoic Cenozoic Paleogene : Neogene Oligocene : Miocene 40Ar/39Ar ages 17. 6-23. 8 Ma, estimated mean age 24 Ma. GM-ARAR : GM-KAR Gradstein et al. 2004 This study Matagalpa Group, sites 13,14 28 32 Ma Phanerozoic Cenozoic Paleogene Oligocene 40Ar/39Ar plateau age 32. 1+/-0. 2 Ma, estimated mean age 30 Ma. GM-ARAR-AP : GM-KAR Gradstein et al. 2004 This study Tamarindo Formation 13 17 Ma Phanerozoic Cenozoic Neogene Miocene K-Ar ages 12. 3-18. 4 Ma, estimated mean age 15 Ma. GM-KAR Gradstein et al. 2004 This study Brito Formation 34 56 Ma Phanerozoic Cenozoic Paleogene Eocene GM-CC-STRAT Gradstein et al. 2004 This study Rivas Basic Intrusions 40 100 Ma Phanerozoic Mesozoic : Cenozoic Cretaceous : Paleogene Late Cretaceous : Eocene K-Ar age 50 Ma. GM-CC-STRAT Gradstein et al. 2004 This study >>>>>>>>>> tab delimited er_citations MAGIC00396150 er_citation_name long_authors year title citation_type journal volume pages book_title book_editors publisher city iaga_database iaga_ref_no This study Elming, S.-A., Layer, P. and Ubieta, K. 2001 A palaeomagnetic study and age determinations of Tertiary rocks in Nicaragua, Central America Journal Geophysical Journal International 147 294-309 GPMDB 3483 As & Zijderveld 1958 As, J.A. and Zijderveld, J.D.A. 1958 Magnetic cleaning of rocks in paleomagnetic research Journal Geophysical Journal International 1 308-319 Collinson 1983 Collinson, D.W. 1983 Book 503 Methods in rock magnetism and Paleomagnetism: Techniques and instrumentation Chapman and Hall London Cox & Doell 1960 Cox, A. and Doell, R.R. 1960 Review of paleomagnetism Journal Geological Society of America Bulletin 71 645 Gradstein et al. 2004 Gradstein, F.M., Ogg, J.G. and Smith, A.G. 2004 Book 588 A Geologic Time Scale Cambridge University Press Cambridge McElhinny & McFadden 2000 McElhinny, M.W. and McFadden, P.L. 2000 Serial Book International Geophysics Series 73 1-1 Paleomagnetism: continents and oceans Dmowska, R., Holton, J.R. and Rossby, H.T. Academic Press San Diego Wilson 1961 Wilson, R.L. 1961 Palaeomagnetism in Northern Ireland, Part I. The thermal demagnetization of natural magnetic moments in rocks Journal Geophysical Journal London 5 45-58 >>>>>>>>>> tab delimited pmag_results pmag_result_name er_location_names data_type fold_test conglomerate_test contact_test reversal_test rock_magnetic_test average_lat average_lon average_age_low average_age_high average_age_unit average_inc average_dec average_alpha95 average_n average_nn average_k vgp_lat vgp_lon vgp_dp vgp_dm tilt_correction tilt_k_ratio tilt_n tilt_inc_corr tilt_dec_corr tilt_k_corr tilt_alpha95_corr tilt_inc_uncorr tilt_dec_uncorr tilt_k_uncorr tilt_alpha95_uncorr fold_test_significance percent_reversed antipodal normal_inc normal_dec normal_n reversed_inc reversed_dec reversed_n iaga_database iaga_res_no result_description magic_method_codes er_citation_names 8860 Coyol Group i ND ND ND Ro ND 12.5 274.7 16 20 Ma -2.8 180.2 11.9 7 47 27 78.9 93.5 8.4 8.4 0 43 GPMDB 8860 Mainly AF, characteristic component 55-70 mT. OP (MAGN). LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study 8861 La Batea Formation i ND ND ND Ro ND 12 275.3 18 22 Ma 5.9 148.8 16.1 4 28 33.3 55.6 161.2 11.5 11.5 0 75 GPMDB 8861 AF and thermal, characteristic component<=65mT, <=600C. OP (MAGN). LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study 8862 Matagalpa Group, sites 8,9,12 i ND ND ND Ro ND 12.7 274.6 22 26 Ma -15 130.3 40.2 3 21 10.5 40.9 183.8 29.6 29.6 0 200 GPMDB 8862 AF and thermal, characteristic component<=65mT, <=600C. OP (MAGN). LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study 8863 Matagalpa Group, sites 13,14 i ND ND ND ND ND 12.4 274.8 28 32 Ma -17.9 92.9 4 2 34 39.8 4.8 192.9 3 3 0 100 GPMDB 8863 AF and thermal, characteristic component<=65mT, <=600C. OP (MAGN). LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study 8864 Tamarindo Formation i ND ND ND Ro ND 12.3 273.2 13 17 Ma 21.6 2 3.2 2 30 67.5 87.7 34.3 3 3 0 50 169.8 19 356 1 -23 186 1 GPMDB 8864 Mainly AF, characteristic component <=100 mT. OP (MAGN). LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study 8865 Brito Formation i Fo ND ND Ro ND 11.4 274 34 56 Ma 7.9 5.8 12.3 5 50 39.5 80.8 55.3 8.8 8.8 100 5 7.9 5.8 39.5 12.3 2.5 6.3 21.1 17.1 200 GPMDB 8865 Mainly AF, characteristic component <=80 mT. Includes some results from RESULTNO 288. LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study 8866 Rivas Basic Intrusions i ND ND ND ND ND 11.4 274.1 40 100 Ma 27.8 358.9 8.7 4 41 113.2 86.5 256.7 7 7 0 1.87 90 200 GPMDB 8866 Mainly AF, characteristic component <=35 mT. Includes some results from RESULTNO 289. LP-DC4 : DE-VGP : LT-AF-Z : LT-T-Z This study >>>>>>>>>> tab delimited magic_methods magic_method_code method_type method_definition method_description method_iaga7 method_url_tauxe er_citation_names DE-VGP Direction Estimation Pole latitude and longitude calculation from mean VGP Ptype V Cox & Doell 1960 GM-ARAR Geochronology Method 40Ar/39Ar age determination GM-ARAR-AP Geochronology Method 40Ar/39Ar age determination: Age plateau GM-CC-STRAT Geochronology Method Correlation chronology: Stratigraphic succession GM-KAR Geochronology Method 40K-40Ar age determination LP-DC4 Lab Protocol Principal component analysis carried out from analysis of Zijderveld diagrams DC4 http://earthref.org/MAGIC/books/Tauxe/2005/lecture.16.htm#IAGA7 McElhinny & McFadden 2000 LT-AF-Z Lab Treatment Alternating field: In zero field A specimen is subject to a decaying and alternating magnetic field such that the magnetic moments with coercivities below the peak field are aligned in opposed directions, and thus cancel. Specimens are typically reoriented in three or more orthogonal axe. A http://earthref.org/MAGIC/books/Tauxe/2005/lecture.09.htm#LT-AFZ As & Zijderveld 1958 : Collinson 1983 LT-T-Z Lab Treatment Specimen cooling: In zero field Heating the specimen to the desired temperature step and then cooling in zero ambient magnetic field. T http://earthref.org/MAGIC/books/Tauxe/2005/lecture.09.htm#LT-TZ Wilson 1961 : Collinson 1983