In accordance with the New York City vaccine requirement, you must be vaccinated against COVID-19 to enter the Museum. See Health and Safety for details.
Part of Hall of Planet Earth.
AMNH/R.Mickens
With burial and the associated increase in pressure and heating, shales may be transformed by re-crystallization in the deep crust into metamorphic rock, like this gneiss. Even greater heating of shales may lead to melting and generation of new granite magma.
AMNH Collection