28 January 2019
Oldest Earth rocks found on the Moon
...from the Hadean epoch on Earth, contains quartz, feldspar, and zircon - minerals that are all commonly found on Earth but are ... the Moon, especially the quartz. "By determining the age of zircon found in the sample, we were able to pinpoint the age...
22 January 2020
2.2 billion year old impact crater is confirmed as Earth's oldest
...Centre, Houston, US, lead author of a study published in Nature Communications. Contained within those chunks of rock where tiny zircon and monazite crystals that left a "shocked" imprint in them when the meteorite struck Earth. Monazite is a reddish...
