Dura mater. Dura mater, or dura, is a thin membrane that is the outermost of the three layers of the meninges that surround the brain and spinal cord. It is derived from mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater.ura mater. Dura mater, or dura, is a thin membrane that is the outermost of the three layers of the meninges that surround the brain and spinal cord. It is derived from mesoderm. The other two meningeal layers are the pia mater and the arachnoid mater.
The story with the most credibility is the one that, the PiÃ±a Colada was introduced on August 15, 1954 at the Caribe Hiltonâs Beachcomber Bar in San Juan, Puerto Rico by its alleged creator, Ramon âMonchitoâ Marrero.
The Cuban Pina Colada, by George Sinclair. The Pina Colada creation myth states that in 1954 a bartender by the name of Ramon âMonchitoâ Marrero invented the famous concoction at the Caribe Hilton Hotel situated in San Juan, Puerto Rico. Or was the Pina Colada invented in 1963 by Don Ramon Portas Mingot also in Puerto Rico.