on all sides by borehole casing 18 in a manner well known in the art while the present invention may function in both cased and uncased boreholes it is its ability to function in a cased borehole that distinguishes it and allows it to solve problems heretofore unaddressed the primary objective of the system of the present invention is not only to identify formations that traverse borehole 10 but also to identify the inclination or dip angle of formations such as those associated with formation 22 shown in fig1 the combination of knowledge about the type of formation and the angle of the formation would for example permit a characterization of the underground formations such that formations to the side of the borehole not specifically traversed by the borehole might be identified as an example the angles of formation 22 and formation 20 shown in fig1 could permit an oil and gas operator to identify formations to one side or the other that would result from the combined angles of the formation layers as shown reference is now made to fig2 for a detailed description of the specific elements and components found in logging tool string 24 shown generally in fig1 fig2 is a schematic diagram not intended to represent the actual geometry of the devices and components present in tool string 24 but rather to identify and suggest their functional relationship and their relative position in the tool string the most important component identified in tool string 24 is pulsed neutron source 42 this radiation based logging system generates a pulsed sequence of high energy neutrons measurement using.