Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_48665 ( "Name" text, "Latitude" text, "Longitude" text, "Diameter (km)" real, "Year named" real )

### Question ###
What is the Year named of the Ganga Valles?

### Accurate SQL ###

SELECT MAX("Year named") FROM table_48665 WHERE "Name" = 'ganga valles'