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Silurian Rhudering nStage Ordovician Period Hirnantian Stage Rawtheya n Stage A. ascensus N. persculptus N. extraordinarius P. pacificus End-Ordovician Mass Extinction A Conodonts no data V Grapolites 216. Trilobites Brenchley et al., 2001 Brachiopods B -2 -1 $180water 1 0 Last glacial max 2 3 C 2 0 813Ccarb 2 Biscketone River Monitor range Copenhagen Canyon LaPorte et al, 2009 Kump et al, 1999 Finnegan et al., 2011 Figure 2. Time-calibrated plot of major species diversity (Panel A) in the Ordovician against values of Oxygen-18 isotopes (Panel B) and Carbon-13 isotopes (Panel C) (from Hammarlund et al. 2012). A rise in 0-18 and C-13 isotopes (indicated by a shift to the right of the panels, respectively) indicates a warming climate.

Silurian Rhudering nStage Ordovician Period Hirnantian Stage Rawtheya n Stage A. ascensus N. persculptus N. extraordinarius P. pacificus End-Ordovician Mass Extinction A Conodonts no data V Grapolites 216. Trilobites Brenchley et al., 2001 Brachiopods B -2 -1 $180water 1 0 Last glacial max 2 3 C 2 0 813Ccarb 2 Biscketone River Monitor range Copenhagen Canyon LaPorte et al, 2009 Kump et al, 1999 Finnegan et al., 2011 Figure 2. Time-calibrated plot of major species diversity (Panel A) in the Ordovician against values of Oxygen-18 isotopes (Panel B) and Carbon-13 isotopes (Panel C) (from Hammarlund et al. 2012). A rise in 0-18 and C-13 isotopes (indicated by a shift to the right of the panels, respectively) indicates a warming climate.

Biology Today and Tomorrow without Physiology (MindTap Course List)
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter11: Evidence Of Evolution
Section: Chapter Questions
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According to Figure 2 above, how many extinction events contributed to the end-Ordovician mass extinction and when did they occur?
Silurian Rhudding nStage Ordovician Period Hirnantian Stage Rawtheya n Stage A. ascensus N. persculptus N. extraordinarius P. pacificus End-Ordovician Mass Extinction A Conodonts no data V Grapolites Trilobites Brenchley et al., 2001 Brachiopods B -2 -1 $180water 0 1 Last glacial max 2 Finnegan et al, 2011 C 2 0 $13C carb 2 4 Blackstone River Monitor range Copenhagen Canyon LaPorte et al, 2009 Kump et al, 1999 Figure 2. Time-calibrated plot of major species diversity (Panel A) in the Ordovician against values of Oxygen-18 isotopes (Panel B) and Carbon-13 isotopes (Panel C) (from Hammarlund et al. 2012). A rise in 0-18 and C-13 isotopes (indicated by a shift to the right of the panels, respectively) indicates a warming climate.
Transcribed Image Text:Silurian Rhudding nStage Ordovician Period Hirnantian Stage Rawtheya n Stage A. ascensus N. persculptus N. extraordinarius P. pacificus End-Ordovician Mass Extinction A Conodonts no data V Grapolites Trilobites Brenchley et al., 2001 Brachiopods B -2 -1 $180water 0 1 Last glacial max 2 Finnegan et al, 2011 C 2 0 $13C carb 2 4 Blackstone River Monitor range Copenhagen Canyon LaPorte et al, 2009 Kump et al, 1999 Figure 2. Time-calibrated plot of major species diversity (Panel A) in the Ordovician against values of Oxygen-18 isotopes (Panel B) and Carbon-13 isotopes (Panel C) (from Hammarlund et al. 2012). A rise in 0-18 and C-13 isotopes (indicated by a shift to the right of the panels, respectively) indicates a warming climate.
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