42774
The process started in about 1,000 Ma , with a notable 7 " km thick layer of Torridon Sandstone being deposited about 800 Ma , as well as the debris deposited by an ice sheet 670 Ma .
 location: Torridon Sandstone
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Torridon Sandstone 
Answer:
 location: Torridon Sandstone