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_name_70 ( decile INTEGER, roll VARCHAR, area VARCHAR )

### Question ###
Name the highest Decile for roll more than 325 and area of warkworth

### Accurate SQL ###

SELECT MAX(decile) FROM table_name_70 WHERE roll > 325 AND area = "warkworth"