Porosity measurements of 22 Upper Cretaceous Chalk samples, and mean Chalk porosities derived from sonic logs in three wells, were used to quantify apparent exhumation (height above maximum burial-depth) in the onshore Cleveland Basin/East Midlands Shelf. Late Cretaceous/Tertiary exhumation of the East Midlands Shelf resulted in the removal of 1.2 km of section near the coast and more than 2 km of section inland, to the west. The southern margin of the Cleveland Basin was exhumed by 2 km, and exhumation increases northwards towards the recognized inversion axis running east–west along the basin’s centre. The northwards increasing exhumation associated with the east–west trending inversion axis of the Cleveland Basin is superimposed upon the regional westward trend of increasing exhumation of eastern England. These two trends control the outcrop distribution of the Upper Cretaceous Chalk in the Cleveland Basin/East Midlands Shelf.

Porosity measurements of 22 Upper Cretaceous Chalk samples, and mean Chalk porosities derived from sonic logs in three wells, were used to quantify apparent exhumation (height above maximum burial-depth) in the onshore Cleveland Basin/East Midlands Shelf. Late Cretaceous/Tertiary exhumation of the East Midlands Shelf resulted in the removal of 1.2 km of section near the coast and more than 2 km of section inland, to the west. The southern margin of the Cleveland Basin was exhumed by 2 km, and exhumation increases northwards towards the recognized inversion axis running east–west along the basin's centre. The northwards increasing exhumation associated with the east–west trending inversion axis of the Cleveland Basin is superimposed upon the regional westward trend of increasing exhumation of eastern England. These two trends control the outcrop distribution of the Upper Cretaceous Chalk in the Cleveland Basin/East Midlands Shelf.

Recent results in the geological history of Indonesia indicate that Timor island (Indonesia) has a Gondwanian origin and emerged about 3.5 Ma ago. The Palaeogene anthracothere artiodactyl described by von Koenigswald in 1967 from this island cannot be autochthonous because of its Laurasiatic affinities. The geological history and structure of Timor is summarized, and the origins of the occurrence of this anthracothere (a floating carcass washed up on the Eocene formations of Timor, a continental Asian fossil recently brought by traders, and an hypothetic partial Asian origin of Timor) are discussed.

Recent results in the geological history of Indonesia indicate that Timor island (Indonesia) has a Gondwanian origin and emerged about 3.5 Ma ago. The Palaeogene anthracothere artiodactyl described by von Koenigswald in 1967 from this island cannot be autochthonous because of its Laurasiatic affinities. The geological history and structure of Timor is summarized, and the origins of the occurrence of this anthracothere (a floating carcass washed up on the Eocene formations of Timor, a continental Asian fossil recently brought by traders, and an hypothetic partial Asian origin of Timor) are discussed.