Limestone.
Valley is a noun. But it is used as an 'adjunct' or adjective to describe things in or about a valley: valley floor, valley streams, valley residents.
because a space man crashed into it:]
A fjord is a valley whose characteristic shape was created by a glacier, so it is a valley after it was glaciated.
Australia has no continental glaciers, because the mountains do not receive sufficient snowfall to form them (at least not in the present era).
rift valley
Limestone
Rift Valley Province's population is 10,006,805.
The area of Rift Valley Province is 182,413 square kilometers.
Great Valley
Cordova is a province in Spain. Compostela Valley is a province in the Philippines.
Benedict Arnold who at that time was serving as a Brigadier General in the British Army.
British Columbia
Sangin Valley, of Helman Province.
Compostela Valley is a province in the southern part of the Philippines, located in the Davao Region of Mindanao. It is known for its natural attractions and mining industry.
Province, Kenya
the great valley !loser! just kidding
Quebec Act 1774 The Quebec Act of 1774 restored the Great Lakes and the Ohio River Valley regions to the province. From Wikipedia