<html> <head> <meta http-equiv=Content-Type content="text/html; charset=unicode"> <meta name=Generator content="Microsoft Word 12 (filtered)"> <style> <!-- /* Font Definitions */ @font-face {font-family:[SO; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:"\@[SO"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:[SO;} h3 {mso-style-link:"h 3 Char"; margin-right:0cm; margin-left:0cm; font-size:13.5pt; font-family:[SO; font-weight:bold;} h4 {mso-style-link:"h 4 Char"; margin-right:0cm; margin-left:0cm; font-size:12.0pt; font-family:[SO; font-weight:bold;} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline;} p {margin-right:0cm; margin-left:0cm; font-size:12.0pt; font-family:[SO;} span.3Char {mso-style-name:"h 3 Char"; mso-style-link:"h 3"; font-family:[SO; font-weight:bold;} span.4Char {mso-style-name:"h 4 Char"; mso-style-link:"h 4"; font-family:"Cambria","serif"; font-weight:bold;} .MsoChpDefault {font-size:10.0pt;} @page WordSection1 {size:595.3pt 841.9pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.WordSection1 {page:WordSection1;} --> </style> <!-- --> </head> <body lang=ZH-CN link=blue vlink=purple> <div class=WordSection1> <div id=mainContent> <h3><span lang=EN-US style='font-family:"Arial","sans-serif";color:blue'>GSSP for Famennian Stage</span></h3> <p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"; color:red'>&nbsp;</span></p> <h4><span lang=EN-US style='font-family:"Arial","sans-serif";color:red'>Definition:</span></h4> <p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif";color:red'>The base of the Famennian Stage is defined in a section near the upper Coumiac Quarry, near Cessenon in southeastern Montagne Noire, France, where it coincides with the lower boundary of the lower <i>Palmatolepis triangularis</i> Zone. This is just above a major extinction horizon (Kellwasser Event), and coincides with the boundary between the <i>Crickites holzapfeli</i> Zone and the <i>Phoenixites frechi</i> Zone in the goniatite scale. </span></p> <table class=MsoNormalTable border=0 cellpadding=0> <tr> <td style='padding:.75pt .75pt .75pt .75pt'> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>Location:</span></h4> <p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>The GSSP section is located above the upper Coumiac Quarry, near Cessenon, Montagne Noire, France. The section is situated in the southeastern Montagne Noire, Department Hrault, District of Cessenon (topographic sheet 1:25 000, No. 2544 E, Murviells-Bziers; Lambert's coordinates: x=130 375, y=658 55). It is adjacent to the southeastern border of the disused upper marble quarry of Coumiac, 175m WSW of the Les Granges farmhouse, about 1.5km NE of Cessenon village and 2100m SW of Causses et Veyran. </span></p> </td> <td valign=bottom style='padding:.75pt .75pt .75pt .75pt'></td> </tr> </table> <p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'>&nbsp;</span></p> <table class=MsoNormalTable border=0 cellpadding=0> <tr> <td style='padding:.75pt .75pt .75pt .75pt'> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>Sedimentology:</span></h4> <p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>The sequence is one of pelagic calcilutites, mostly red tinted and well bedded, with bedding probably controlled by Milankovitch-Band climatic oscillations during sedimentation. The boundary is drawn between Beds 31g and 32a. Distinctive is Bed 31g which is correlated with the Upper Kellwasser Limestone of Germany and which is a hypoxic dark grey calilutite to calcarenite above which is the most marked faunal boundary. </span></p> </td> <td valign=bottom style='padding:.75pt .75pt .75pt .75pt'></td> </tr> </table> <p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'>&nbsp;</span></p> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>Primary Markers:</span></h4> <p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'>The GSSP is defined by the abundant occurrence of the conodont species <i>Palmatolepis triangularis</i> in Bed 32a. The boundary corresponds to the extinction of all species of the conodonts <i>Ancyrodella</i> and <i>Ozarkodina</i> and the loss of all but a few species of <i>Palmatolepis, Polygnathus</i> and <i>Ancyrognathus</i>. </span></p> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>Secondary Markers:</span></h4> <p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=EN-US style='font-family:"Arial","sans-serif"'>Goniatites:</span></b><span lang=EN-US style='font-family:"Arial","sans-serif"'><br> Goniatites of the <i>Gephuroceratidae</i> and <i>Beloceratidae</i> become extinct below the boundary. <i>Crickites holzapfeli</i> becomes extinct in Bed 31g and <i>Phoenixites frechi</i> has its first occurrence in Bed 32a. </span></p> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>Correlation Events:</span></h4> <p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'>Conodont FAD <i>Palmatolepis triangularis</i>, just above a major extinction horizon (Kellwasser Event) with conodont LADs <i>Ancyrodella</i> and <i>Ozarkodina</i>, and Goniatite LADs of <i>Gephuroceratidae</i> and <i>Beloceratidae</i> </span></p> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>Notes on Derivation of Age:</span></h4> <p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'>Devonian time scale is a statistical fit of a composite biostratigraphic zonation (based on Figure 8 of Williams et al., 2000) to selected radiometric ages </span></p> <h4><span lang=EN-US style='font-family:"Arial","sans-serif"'>References:</span></h4> <p style='margin-left:36.0pt;text-indent:-36.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'><a href="Famennian.pdf">Klapper, G., Feist, R. Becker, R. T., and House, M. R., 1993. Definition of the Frasnian/Famennian Stage boundary. Episodes 16/4, p. 433 - 441.</a></span></p> <p class=MsoNormal><span lang=EN-US><br> <br> <a href="index.html">Back to GSSP Table</a></span></p> </div> </div> <!-- --> </body> </html>