New Orleans, Louisiana.
If you look at a map and insert these coordinates, New Orleans is the city located at 30n 89w.
Hope this helps!
Sauli Niinisto is the president of finland
The large island which is also part of the Antilles that Jamaica, an island of the Antilles Group, lies south of is Cuba, with its capital of Havana.
I would say that in very fast moving water such as in a river, the cobble size could be transported because cobbles are 64-256mm so are quite big and in a quiescent stream won't move much but in a freshet say in a steep mountain stream they can be rolled along such as I observed in the local streams at a mining town during the Hurricane Fifi in Honduras in 1974.