19665
This was apparently confirmed by the identification in the overlying beds of a conodont fauna with a recognizably Silurian character , but when the palæomagnetism of the area was studied , an early Ordovician age was deduced .
 conodont
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 conodont