The Global Stratotype Section and Point(GSSP)for the base of Toarcian Stage,Lower Jurassic,is placed at the base of micritic limestone bed 15e at Ponta do Trovão(Peniche,Lusitanian Basin,Portugal;coordinates:39&#...The Global Stratotype Section and Point(GSSP)for the base of Toarcian Stage,Lower Jurassic,is placed at the base of micritic limestone bed 15e at Ponta do Trovão(Peniche,Lusitanian Basin,Portugal;coordinates:39°22′15″N,9°23′07″W),80km north of Lisbon,and coincides with the mass occurrence of the ammonite Dactylioceras(Eodactylites).The Pliensbachian/Toarcian boundary(PLB/TOA)is contained in a continuous section forming over 450m of carbonate-rich sediments.Tectonics,syn-sedimentary disturbance,metamorphism or significant diagenesis do not significantly affect this area.At the PLB/TOA,no vertical facies changes,stratigraphical gaps or hiatuses have been recorded.The base of the Toarcian Stage is marked in the bed 15e by the first occurrence of D.(E.)simplex,co-occurring with D.(E.)pseudocommune and D.(E.)polymorphum.The ammonite association of D.(Eodactylites)ssp.and other species e.g.Protogrammoceras(Paltarpites)cf.展开更多
The Bathonian GSSP is defined at the base of limestone bed RB071 in the Ravin du Bès Section,Bas-Auran area,southern Subalpine Chains(France).This section satisfies most of the requirements recommended by the Int...The Bathonian GSSP is defined at the base of limestone bed RB071 in the Ravin du Bès Section,Bas-Auran area,southern Subalpine Chains(France).This section satisfies most of the requirements recommended by the International Commission on Stratigraphy.The exposure extends over 13 m in thickness.展开更多
基金supported by the BIOSCALES Project(POCTI/36438/PAL/2000)coordinated by the Universidade NOVA de Lisboa+1 种基金R.B.Rocha thanks the support of A.F.Soares,J.C.Kullberg,P.S.Caetano and P.H.VerdialFinancial support was provided to L.V.Duarte,S.Pinto and M.C.Cabral by Projects PDCTE/CTA/44907/2002 and PTDC/CTE-GIX/098968/2008.
文摘The Global Stratotype Section and Point(GSSP)for the base of Toarcian Stage,Lower Jurassic,is placed at the base of micritic limestone bed 15e at Ponta do Trovão(Peniche,Lusitanian Basin,Portugal;coordinates:39°22′15″N,9°23′07″W),80km north of Lisbon,and coincides with the mass occurrence of the ammonite Dactylioceras(Eodactylites).The Pliensbachian/Toarcian boundary(PLB/TOA)is contained in a continuous section forming over 450m of carbonate-rich sediments.Tectonics,syn-sedimentary disturbance,metamorphism or significant diagenesis do not significantly affect this area.At the PLB/TOA,no vertical facies changes,stratigraphical gaps or hiatuses have been recorded.The base of the Toarcian Stage is marked in the bed 15e by the first occurrence of D.(E.)simplex,co-occurring with D.(E.)pseudocommune and D.(E.)polymorphum.The ammonite association of D.(Eodactylites)ssp.and other species e.g.Protogrammoceras(Paltarpites)cf.
基金supported by the CGL2004-0694/BTE(MEC-CSIC)and CGL2008-01273/BTE(MICINN)projectsgrants from the 2006 and 2007 Geoconservation Projects,respectively coordinated at the Madrid and Torino universities.
文摘The Bathonian GSSP is defined at the base of limestone bed RB071 in the Ravin du Bès Section,Bas-Auran area,southern Subalpine Chains(France).This section satisfies most of the requirements recommended by the International Commission on Stratigraphy.The exposure extends over 13 m in thickness.
