Carver and Plympton police closed down an illegal marijuana farm Friday where $10,000 worth of the plant was growing, authorities said. Police located the farm on the Carver-Plympton line in a wooded area near Montello Street after receiving an anonymous tip, police said. Police surveillance confirmed that marijuana was growing there, the statement said. The plants were found at different stages of maturity, with an estimated street value of $10,000, according to the statement. If a suspect is identified, he or she could face charges of unlawful cultivation of a controlled substance, police said.