85683
The granite ( or more specifically adamellite ) was intruded at depth as a pluton into the surrounding sedimentary rocks during the Carboniferous period , probably about 309 million years ago .
 Carboniferous
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carboniferous