Nevertheless , the Taconic fauna of Emmons proved to include only the lower part of Sedgwick 's Cambrian .
Marcou was thus led to advocate that the term Taconic be generally adopted in place of Cambrian .
The Taconic fauna of Emmons proved to include only the lower part of Sedgwick 's Cambrian .
Marcou was thus led to advocate that the term Taconic be generally adopted in place of Cambrian .