In some parts of the world, more than a billion years of geologic history is missing. Now a team of scientists think they ...
Much of our understanding of Earth's past is derived from stratigraphic records exposed in rock outcrops or recovered from drilled cores. These records span immense time intervals, from thousands to ...
A layer of rock just 520 million years old sat directly on top of ancient rock dating back 1.4 to 1.8 billion years.
There are many open questions about how our planet formed 4.55 billion years ago: When did plate tectonics start? When did the Earth's mantle begin to vigorously circulate in a process called ...
A massive meteorite strike 3.5 billion years ago left behind the world’s oldest known impact crater, challenging previous ...