<p>The purpose of the article is to create a tectonic basis in the form of a classification of <br /> the earth crust in Uzbekistan based on a complex of geological and geophysical data characterizing its contemporary structure and condition. The classification of the earth crust into homogeneous areas opens up broad opportunities in the study of endogenous processes and geodynamics. It is essential to establish connections between the types of layers and determine their place in the general system. If the determined types of the crust are selected as to reflect different endogenous conditions, this will enable us to judge of the current structure of the crust as well as of the patterns of its development. The classification technique is based on a cluster analysis (solving a classification problem), which allows comprehensive and simultaneous processing of a huge amount of information. The article is devoted to the selection of a complex of initial geological – geophysical information for classification of the earth crust. Statistical and correlation investigations of the initial data are underway, typification issues will be addressed based on the cluster analysis. The typification outcomes are under discussion.</p>