The World’s Largest Rock Tumbler is an Unusual Testimony to an Ancient Earth

Evidence that some features of earth’s landscape are the product of processes acting over longer periods of time can be found everywhere we look.  Some of this evidence, such as that from the Grand Canyon, may be familiar to us but other evidence is far less familiar but tells the same story.  For example, high […]

Ancient Mars: Cosmogenic Dating Methods Allow Estimates of Erosion Rates on Mars

The NASA rover Curiosity has been making its way across the floor of Gale crater on Mars since 2012.  It has closely examined a wide range of rock types which reveal that this location on Mars has experienced a long history of variable climates.  From water-infused bedrock, water-deposited conglomerates, wind-formed fossilized dunes to active sand […]

Can You Spot the Difference? The Slowly Changing Surface of Mars

How different is the surface of Mars today compared to one thousand, a hundred thousand or a million years ago?  The photo below was snapped by the Curiosity Rover which has spent several years trekking across an ancient lake-bed inside a large crater on Mars.  It is a barren, forbidding but strangely familiar and beautiful […]

Cosmogenic Dating Methods Allow Estimates of Erosion Rates on Mars

Just how fast are some rocks on Mars eroding?  A few months ago I asked a Martian rock that question (see: My Interview with a Martian: A Story of Origins) and I was not given a very satisfying answer.  Well, that rock can be excused for being a bit confused about time given how boring […]

Kamil Meteor Crater: A “Young” Impact on Earth Compared to Craters on Mars

Kamil Meteorite crater is a recently discovered crater in Egypt which is an example of a very young crater on earth. What can Kamil Crater tell us about the origin of craters not only on Earth but also on other Planets? And what does this tell us about the age of the Earth and those other planets?

The Strange Rubbing Boulders of the Atacama

The worlds largest rock tumbler? This story  caught my eye this morning.   GSA press release – The Strange Rubbing Boulders of the Atacama.  It seems that every other day I read about some place on earth that has a strange story to tell and usually that story is difficult to understand without an earth that […]