The Chickasaw bluff is the most northern of four bluffs on the lower Mississippi River. Its unique geographical features allowed for the settlement of Memphis, Tennessee, in that the high ground of the bluff has not flooded since the last glaciation in North America, also know as an ice age. The Chickasaws are a Native American people of the United States, originally from present-day Mississippi, now mostly living in Oklahoma. ... This article is about the New Zealand town of Bluff. ... The Mississippi River, derived from the old Ojibwe word misi-ziibi meaning great river (gichi-ziibi big river at its headwaters), is the second-longest river in the United States; the longest is the river Missouri River, which flows into the Mississippi. ... Nickname The River City, The Bluff City Location Location in Shelby County and the state of Tennessee Government Country State Counties United States Tennessee Shelby County Mayor W. W. Herenton (D) Geographical characteristics Area  - Total  - Land  - Water 294. ... Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years For the animated movie, see Ice Age (movie). ...