Words similar to million-year-old

Example sentences for: million-year-old

How can you use “million-year-old” in a sentence? Here are some example sentences to help you improve your vocabulary:

The oldest rocks are 500 million-year-old slates found around the northern peak of Skiddaw, where the mountains have smooth and rounded profiles.
In 2000, a team of United States researchers claimed to have cultured a bacterium sealed inside a 250-million-year-old salt crystal [9].
Scientists found a new candidate for the missing link between apes and humans . The 2.5 million-year-old creature, dubbed Australopithecus garhi , evidently used stone tools to carve up the animals it killed and had much bigger teeth than its apelike ancestors.
This beautifully organized museum, drawing on the most modern audiovisual techniques, is named after Joseph Tyrrell, the geologist who made the first discovery of Alberta’s 65-million-year-old dinosaurs while surveying coal seams along the Red Deer River in 1884.
According to Michael Lee of the University of Sydney and Michael Caldwell of Chicago's Field Museum, the 100-million-year-old fossil, christened Pachyrachis problematicus ("problematic thick-ribbed animal") in the late 1970s, is a proto-snake with two legs.