"An endolithic environment is an environment that exists within solid rock. " . "endolithic environment" . _:b1218491 . _:b1218489 . _:b1218490 . _:b1218490 . _:b1218493 . _:b1218493 . _:b1218493 . _:b1218492 _:b1218491 . . _:b1218490 . _:b1218493 . _:b1218492 . _:b1218491 _:b1218490 . . _:b1218489 _:b1218492 . _:b1218489 .