Lithosphere-Asthenosphere boundary a thermal control of oceanic-lithosphere thickness. The continental lithosphere contains an ancient, stable part known as the craton. The LAB is particularly difficult to study in these regions and evidence suggests that the lithosphere within this old part of the continent is at it thickest and even appears to exhibit large variations in thickness beneath the cratons, thus supporting the theory that lithosphere thickness and LAB depth are age-dependent. Depths of the LAB beneath these regions (also known as shields and platforms) are estimated to be between 200 and 250 km deep. Beneath Phanerozoic continental crust, the LAB is roughly
The Earth Museum are like lamps lighted where we need them most, illuminating what is around them and the way we need to go. The fuel of those lamps is the imagination. Thank you, my Turkish readers and friends and fellow-writers, for keeping the light burning."" (Ursula K. Le Guin, January, 2018) The Earth Museum features Burak Albayrak as the editor, Tuðçe Nida Sevin as the coordinator and includes a preface by Bulent Akkoc. The collection comprises the following short stories: The Earth Museum The Earth Museum () is an anthology of 18 science-fiction stories by 18 Turkish sci-fi writers published in January