The town of St. Mary 's of Aransas was founded southwest of Copano .
The town of St. Mary 's of Aransas was thrived as a port and wood mart , until numerous shipwrecks caused by the bay 's hidden reefs concluded its use in 1875 .
The town of St. Mary 's of Aransas was founded southwest of Copano and thrived as a port and wood mart , until numerous shipwrecks caused by the bay 's hidden reefs concluded its use in 1875 .