Petroleum Technology Development Journal (ISSN 1595-9104): An International Journal; July 2012 - Vol. 2 1 Temperatures and Geothermal Gradient Fields in the Calabar Flank and Parts of the Niger Delta, Nigeria By Chukwuemeka Frank Odumodu Department of Geology, Anambra State University, P.M.B. 02, Uli, Anambra State raluchukwu @ yahoo.com Published in: Petroleum Technology Development Journal (ISSN 1595-9104) An International Journal July 2012 - Vol. 2; No 2