CREATE TABLE table_15087 ("Mountain" CLOB, "Elevation" CLOB, "Range" CLOB, "State ( s ) " CLOB, "Surface" CLOB)

What is the surface of the mountain range that contains the Elk Garden Mountain?
SELECT "Surface" FROM table_15087 WHERE "Mountain" = 'elk garden'
SELECT "Surface" FROM "table_15087" WHERE "Mountain" = 'elk garden'