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.
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.
In 1994, while Jurassic Park was still taking in millions of dollars at the box office, scientists claimed to have extracted and sequenced DNA from an 80-million-year-old dinosaur [1].
[ 28 ] reported the isolation and growth of a previously unrecognized spore-forming bacterium (a Bacillus species, designated 2-9-3) from a brine inclusion within a 250 million-year-old salt crystal from the Permian Salado Formation.