Question: Which masonry fort in the continental United States was  USS "Fort Marion"  named for 
Context: The Mobile Point Range Lights were a series of lighthouses at the entrance to Mobile Bay, at Mobile Point on the tip of the Fort Morgan peninsula, near Mobile, Alabama, United States.  The first lighthouse was built as a landfall light by June 1822 at a cost of $9,995.  The lighthouse was a conical brick masonry tower, 40 ft tall.  It was first lit on 29 September 1822.  Fort Morgan was built adjacent to the lighthouse in 1833.  The lighthouse was joined by the 200 ft Sand Island Light across the mouth of the bay, about 3 mi away in 1858.  This resulted in the Mobile Point Lighthouse being downgraded to a harbor light, at the same time a fourth order Fresnel lens was installed.  A period photograph (see infobox), taken prior to the American Civil War, shows two shorter masonry towers standing on the beach below the main tower, they served as range lights.  The lighthouse was subsequently destroyed by cannonball fire in the Battle of Mobile Bay during the Civil War. USS "Fort Marion" (LSD-22) was a "Casa Grande"-class dock landing ship of the United States Navy.  She was named for the Castillo de San Marcos in St. Augustine, Florida, which was named Fort Marion from 1821 till 1942. The October 2010 North American storm complex is the name given to a historic extratropical cyclone that impacted North America.  The massive storm complex caused a wide range of weather events including a major serial derecho stretching from the Gulf Coast to the Great Lakes, a widespread tornado outbreak across the Southeast United States and Midwest and a blizzard across portions of the Canadian Prairies and the Dakotas.  The cyclone's lowest minimum pressure of 955.2 mb made it the second most intense non-tropical system recorded in the continental United States (CONUS).  The lowest confirmed pressure for a non-tropical system in the continental United States was set by a January 1913 Atlantic coast storm. David Pendleton Oakerhater (b. ca. 1847, d. August 31, 1931), also known as O-kuh-ha-tuh and Making Medicine, was a Cheyenne Indian warrior and spiritual leader, who became an artist and Episcopal deacon.  Imprisoned in 1875 after the Indian Wars at Fort Marion (now Castillo de San Marcos), Florida, Oakerhater became one of the founding figures of modern Native American art.  Later he was ordained as a deacon in the Episcopal Church in the United States of America and worked as a missionary in Oklahoma.  In 1985, Oakerhater was the first Native American Anglican to be included in the book of Lesser Feasts and Fasts of the Episcopal Church. The Castillo de San Marcos is the oldest masonry fort in the continental United States.  Located on the western shore of Matanzas Bay in the city of St. Augustine, Florida, the fort was designed by the Spanish engineer Ignacio Daza.  Construction began in 1672, 107 years after the city's founding by Spanish Admiral and conquistador Pedro Menéndez de Avilés, when Florida was part of the Spanish Empire.  The fort's construction was ordered by Governor Francisco de la Guerra y de la Vega after the destructive raid by the English privateer Robert Searles in 1668.  Work proceeded under the administration of Guerra's successor, Manuel de Cendoya in 1671, and the first "coquina" stones were laid in 1672.  The construction of the core of the current fortress was completed in 1695, though it would undergo many alterations and renovations over the centuries. Fort Jefferson is a massive but unfinished coastal fortress.  It is the largest brick masonry structure in the Americas, and is composed of over 16 million bricks.  Among United States forts, only Fort Monroe in Virginia and Fort Adams in Rhode Island are larger.  The fort is located on Garden Key in the lower Florida Keys within the Dry Tortugas National Park, about 70 mi west of the island of Key West.  The Dry Tortugas are part of Monroe County, Florida, United States. James Karrick Woolnough (October 24, 1910 – May 30, 1996) was a United States Army four-star general who served as Commanding General of the United States Continental Army Command at Fort Monroe, Virginia.  In this capacity he was responsible for the command and control of all active and reserve forces in the Six Armies of the Continental United States from 1967 to 1970. Fort Bowyer was a short-lived earthen and stockade fortification that the United States Army erected in 1813 on Mobile Point, near the mouth of Mobile Bay in Baldwin County, Alabama.  The British twice attacked the fort during the War of 1812.  The first, unsuccessful attack, took place in September 1814 and led to the British changing their strategy and attacking New Orleans.  The second attack, following their defeat at the Battle of New Orleans, was successful.  However, it took place in February 1815, after the Treaty of Ghent had been signed but before the news had reached that part of America.  Between 1819 and 1834 the United States built a new masonry fortification, Fort Morgan, on the site of Fort Bowyer. Fort Bliss is a United States Army post in the U.S. states of New Mexico and Texas, with its headquarters located in El Paso, Texas.  Named in honor of LTC William Bliss (1815-1853), a mathematical genius who was the son-in-law of President Zachary Taylor, Ft. Bliss has an area of about 1700 sqmi ; it is the largest installation in FORSCOM (United States Army Forces Command) and second-largest in the Army overall (the largest being the adjacent White Sands Missile Range).  The portion of the post located in El Paso County, Texas, is a census-designated place with a population of 8,591 as of the time of the 2010 census.  Fort Bliss provides the largest contiguous tract (1500 sqmi ) of restricted airspace in the Continental United States, used for missile and artillery training and testing, and at 992,000 acres boasts the largest maneuver area (ahead of the National Training Center, which has 642,000 acres). USS "San Marcos" (LSD-25) was a "Casa Grande"-class dock landing ship of the United States Navy, named for the Castillo de San Marcos, the oldest masonry fort still standing in the United States.  In 1911, the second-class battleship "Texas" had also briefly borne the name "San Marcos", perhaps for the town of San Marcos, Texas.
Answer: The Castillo de San Marcos