Vistula Lagoon of the Ests". Over three hundred years later, in the first half of the 13th Century, the name of Vistula Lagoon occurs in deeds issued by Teutonic Order in Latin version as Mare Recens (1246 - "mare" - a pool or lake or sea and "recens" - fresh) in contrast to the contemporary name for the Baltic Sea - Mare Salsum (Salty Sea). Then in 1251 we find record about Mare Recens et Neriam (Frisches Haff and Frische Nehrung, now Vistula Spit) and finally in 1288 Recenti Mari Hab (Haff) which as one can see corresponds with later German "Frisches
Rodeo Lagoon throughout the summer algae bloom. The lagoon is located within the geologically complex Marin Headlands and fills a valley drowned by recent sea level rise following the last glacial period. The bed of the lagoon is covered by viscous black mud that is high in organic content, except at the east and west ends, where non-organic sediment can be found. Rodeo Lagoon was mostly unaltered until the area was developed by the U.S. military into Fort Cronkhite and Fort Barry In 1937, the Army constructed a road crossing at the east of the lagoon, which resulted in a reduction in