What is a Marker Bed?
I’ve had a couple requests to give a few more examples of what a geological marker bed (a.k.a. marker horizon) actually is, and more fully explain why I chose Marker Bed as the title...
Category: Sedimentary
Paleontology: How the Earth Makes a Fossil
We’ve spent a couple recent posts discussing geologic time and the two methods earth scientists use to describe and measure it. We started with a general introduction to earthtime and absolute age dating (Intro...
Intro to Relative Geologic Time
If you managed to plow through my latest post on Absolute Age Dating (Intro to Geologic Time), you probably muttered something like “This sounds too much like real science to be any fun at...
Carbon Dioxide and Climate Change for Dummies
This post may be a bit longer than usual, so get comfy. Click here for an index of earlier posts that touch on some of this. When I was at Physical Therapy a couple...
Quicksand (a.k.a. Liquefaction)
I had a great question a little bit ago on the Ask GeoMan section of my GeoMania educational website from Elizabeth in Lake Oswego, Oregon. She’d been walking on Nye Beach on the central...
