 
 <prompt> How ocean ridges take dey become denser? Given di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: ```To the north of Africa, the Tethys Sea still dey narrow. Broad shallow seas dey move across central North America (the Western Interior Seaway) and Europe, then e comot late for the period, come leave thick marine deposits wey dey between coal beds. For the peak of the Cretaceous transgression, one-third of Earth's present land area dey underwater. The Cretaceous dey famous for the chalk wey dey form inside am; infact, more chalk form for the Cretaceous pass any other period for the Phanerozoic. Mid-ocean ridge activity—or rather, the circulation of seawater through the enlarged ridges—enriched the oceans with calcium; this make the oceans more saturated, as well as increase the bioavailability of the element for calcareous nanoplankton. These widespread carbonates and other sedimentary deposits make the Cretaceous rock record especially fine. Famous formations from North America include the rich marine fossils of Kansas's Smoky Hill Chalk Member and the terrestrial fauna of the late Cretaceous Hell Creek Formation. Other important Cretaceous exposures dey for Europe and China. For the area wey be India now, massive lava beds wey dem call the Deccan Traps dey laid down for the very late Cretaceous and early Paleocene.``` 