sentences:  A museum called the Hour Glass in Ogden Dunes has exhibits that document the ecological significance.The area of Indiana which became Porter County was occupied by an Algonquian people named by the archeologist as the Huber-Berrien.This subsistence culture arrived after the glaciers retreated somewhere around 15,000 years ago and the rise of glacial Lake Algonquian, 4–8,000 years ago.