Trying to find information on Mathias Christianson b.1848 d.1928

[Staceyfj]

Hello everyone,
I am trying to find information on my 2nd grandfather. 
Mathias Christianson. He was born in 1848 in Norway (possibly) and came to Minnesota (Yellow Medicine County), where he married Anna Christensdatter Gjerde (she was born in Gjerde Hjørundfjorden, Møre og Romsdal in 1852). Mathias died in 1928 in Minnesota. I have searched everywhere I can think of, and I haven't been able to locate any information on him at all. 
Thanks for your help,
Stacey