Hi Jeff, I didn't find an Ann Moran who had lived in 1852 in Yuba County and died there at a later date.
You can contact a volunteer about who was buried when in Marysville Cemetery. Send an email to email@example.com . If they can find out when Ann was buried there, then you can request a copy of her death record from the Yuba County Clerk/Recorder, www.co.yuba.ca.us/departments/clerk/.
There is no guarantee they're going to find her death certificate or record because they weren't required by the State of California until 1905. Successful Searching!