503B 3/11/91MPB 503B GrpEvent Plotcode Y. Age Old Age Top depth Bottom depth 503B D top N.reinholdii tNr 0.65 3-2,100 3-3,40 503B D top N.fossilis tNf 0.85 3-2,100 3-3,40 503B D top R.matuyamai tRm 0.94 3-CC 4-1,40 503B D base R.matuyamai bRm 1.10 4-2,40 4-2,100 503B D top R.praebergonii v. robusta bRpr 1.55 5-3,40 5-3,100 503B D base P.doliolus bPd 1.80 10-3,94 10-CC 503B D top N.jouseae tNj 2.60 12-CC 13-3,40 503B D base T.convexa v.convexa bTcc 3.60 19-1,110 19-2,40 503B D top N.cylindrica tNc 4.30 24-CC 25-CC 503B F BT G.truncatulinoides Btrc 1.90 8,CC 8,CC 503B F TOP G.pertenuis Tprt 2.50 15,CC 16-3,106 503B F TOP Gq.altispira Talp 2.90 14,CC 15-2,106 503B F BT G.fistulosus Bfst 2.90 16,CC 17-1,106 503B F TOP Sph.psis spp TSdp 3.00 15-2,106 15-3,106 503B F BT Sph.ella dehiscens s.s. BSdd 3.00 21-2,106 21,CC 503B F BT G.pertenuis Bprt 3.30 17-2,106 17,CC 503B F TOP P.spectabilis TPsp 3.90 22,CC 23,CC 503B F BT G.crassaformis s.s. Bcrs 4.10 19-2,106 19,CC 503B M Jaramillo B1N2 0.98 4-2,30 4-2,40 503B M Olduvai B2N1 1.88 7-3,100 8-2,20 503B M Gauss T2AN1 2.47 12-2,60 12-2,100 503B M Gauss (^mammoth) T2AN2 2.99 15-3,80 15-3,100 503B M Gauss B2AN2 3.08 16-2,75 16-2,140 503B M Gilbert-cochiti T3N2 4.10 21-3,25 21-3,45 503B N Discoaster pentaradiatus T Dpe 2.40 11-CC 12-1,40 503B N Discoaster surculus T Dsu 2.40 12-2,110 12-3,40 503B N Discoaster tamalis T Dta 2.60 13-2,40 13-3,40 503B N Reticulofenestra pseudoumbilicus T Rps 3.50 17-CC 18-CC 503B N Discoaster asymmetricus B Das 4.10 21-CC 22-CC 503B N Ceratolithus rugosus B Cru 4.50 25-2,40 25-2,110 503B N Ceratolithus acutus T Cac 4.57 25-1,120 25-2,40 503B R B Anthocyrtidum angulare BACAN 1.70 6-3,50 7-2,50 503B R B Collosphaera tuberosa BCOTU 0.28 1-2,51 2-1,51 503B R B Lamprocyrtis neoheteroporos (I) BLMNE 2.52 13-3,50 14-2,50 503B R B Lamprocyrtis nigriniae BLMNI 1.20 4-3,51 5-1,51 503B R B Pterocanium prismatium BPTPS 4.90 24-2,51 25-1,51 503B R B Pterocorys hertwigii (I) BPCHE 0.80 6-3,50 7-2,50 503B R B Spongaster tetras BSPTE 3.70 21-1,51 22-1,51 503B R B Theocorythium trachelium BTHTR 1.50 5-3,51 6-2,50 503B R T Anthocyrtidium angulare TACAN 1.05 3-3,51 4-1,51 503B R T Lamprocyrtis neoheteroporos (I) TLMNE 1.11 3-3,51 4-1,51 503B R T Lychnodictyum audax TLDAU 3.40 18-3,51 19-1,51 503B R T Phormostichoartus fistula TPHFI 3.30 15-2,50 16-3,50 503B R T Pterocanium prismatium TPTPS 1.60 8-2,54 8-3,50 503B R T Spongaster berminghami TSPBE 4.20 22-1,51 22-2,51 503B R T Stichocorys peregrina TSCPE 2.60 14-2,50 14-3,50 503B R T Stylatractus universus TSYUN 0.42 2-1,51 2-2,51 503B R T Theocorythium vetulum TTHTV 1.20 4-3,51 5-1,51