Diplodocus now common scientific opinion that "Seismosaurus hallorum" is a species of "Diplodocus". This genus of dinosaurs lived in what is now mid-western North America at the end of the Jurassic period. "Diplodocus" is one of the more common dinosaur fossils found in the middle to upper Morrison Formation, between about 154 and 152 million years ago, during the late Kimmeridgian age. The Morrison Formation records an environment and time dominated by gigantic sauropod dinosaurs, such as "Apatosaurus", "Barosaurus", "Brachiosaurus", "Brontosaurus", and "Camarasaurus". "Diplodocus" is among the most easily identifiable dinosaurs, with its typical sauropod shape, long neck and tail, and
Unthought known unthought known. Bollas also linked the concept to D. W. Winnicott's notion of the true self. In terms of systems-centered therapy, the concept refers to the boundary between "apprehensive" knowing (non-verbal) and "comprehensive" knowing – what we can allow ourselves to formulate in words. In therapy, the unthought known can become the subtext of the therapeutic interchange – the therapist's role then becoming that of picking up and containing (through projective identification) what the patients themselves cannot yet think about. Unthought known Unthought known is a phrase coined by Christopher Bollas in the 1980s to represent those experiences in some