61174
In North America , only an extremely narrow belt of permafrost existed south of the ice sheet at about the latitude of New Jersey through southern Iowa and northern Missouri , but permafrost was more extensive in the drier western regions where it extended to the southern border of Idaho and Oregon .
 North America, New Jersey, Iowa, Missouri, Idaho, Oregon
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:
 North America, New Jersey, Iowa, Missouri, Idaho, Oregon