I understand the stylistic rules for capitalizing the word "river" in a place name, but I can't seem to find any consistent guidelines on whether to capitalize the word "basin" when it follows an instance where "river" should be capitalized.
example:
"The Hooseywhatsit River Basin is home to several species of platypus."
or
"The Hooseywhatsit River basin is home to several species of platypus."