 how many mean elevation with lowest point being gulf of mexico and state being texas
CREATE TABLE "table1_1416612_1" (
  "state" text,
  "highest_point" text,
  "highest_elevation" text,
  "lowest_point" text,
  "lowest_elevation" text,
  "mean_elevation" text
);
SELECT COUNT("mean_elevation") FROM "table1_1416612_1" WHERE "lowest_point"='Gulf of Mexico' AND "state"='Texas';