Despite a mass of new data that have been collected during the last few decades, some major problems of western Anatolian geology still remain controversial. Among these, cause and timing of generation of the Menderes Massif and the magmatic associations, the north-south trending grabens and time of inception of the east-west grabens, are at the forefront. Almost all of these geological events appear to be genetically closely linked with the extensional tectonics, because the extension has played strong tectonic and geologic control on their development. Therefore, a first-order problem that needs to be addressed is whether the extensional regime is continually active, since it began possibly during the late Eocene time, or has it evolved in pulses. As a consequence of the nature of the problem, establishing a cross connection between the different events and evaluating them in time-space and regional geological perspective are critical.