Nyamweru, C2011-10-272011-10-272011-10-27http://ir-library.ku.ac.ke/handle/123456789/1447AbstractStable oxygen and carbon isotope ratios in the shells of the freshwater gastropod, Melanoides tuberculata, collected at five early Holocene sites in the Chalbi Basin of north-central Kenya, have been measured. These ratios indicate that at 10,000–11,000 yr.ago, paleo Lake Chalbi was a freshwater lake of considerable stability, despite its large extent and shallow depth.enArticle