I play this game for several weeks and one think is very frustrating - each morning, I have to re-discover 1/2 of all mines and stone deposits. (I know deposits expire, no argue with that)
However discovering takes time, even with 2 geologist I have to log in like 10 times just to rediscover all... and that is not acceptable (I want to log in at most twice a day)
I suggest to add queue to a geologist (like provision house or barracks) so I could order my geologist to discover 3 marble mines and 1 coal mine and same (not only) myself a lot of wasted time.