YOu have oaks all over texas. They are just runts, by standard the rest of us are used to seeing Oaks be in the rest of the country. There is not enough water to feed your oaks, so they are small, rarely more than 45 feet tall, but very broad. Up in the Midwest, Oaks often get over 100 feet in height, and 120-150 feet is not impossible. White oak is harvested to use in make whiskey barrels, because the cells grow in columns, letting moisture be carried up and down the length of the woodgrain. Red oak is much harder, tougher, and more gnarly to handle. Slower growing, too.