John I Garver

5 Questions 32 Answers 0 Followers

Questions related from John I Garver

Why (or how) does Radon adsorb onto activated carbon?

This question has bothered me for some time. If radon is a non-reactive noble gas, then why does it so easily adsorb onto activated carbon? What is the reaction? There must be a simple...

03 November 2017 6,775 3 View

Can anyone suggest effective methods for removal of barite from a zircon mineral separate?

These are separates from a altered detrital sample. Barite is obviously heavy and non-magnetic, so we are dealing with the final non-magnetic heavy fraction. Obviously the goal here is the...

12 October 2016 5,479 5 View

Does anyone have suggestions for specific units to do measurements of gamma rays on outcrops using commercially available portable devices?

I am interested in mapping outcrops for gamma radiation. I see that there are a number of commercially available units, but I sense that the field is rapidly changing and advancing. Thus, I am...

19 October 2014 9,104 6 View

Can anyone identify these Silurian fossils?

I ran across this clast in a poorly dated conglomerate that is likely Silurian in age (coastal Maine - USA, peri-Gondwanan: definitely pre-Devonian). The clast is gray-black and the features are...

17 August 2014 5,402 10 View

Does anyone know what this trace fossil (or fossil) is? It is from relatively deep water rocks of Paleocene-Eocene age in Alaska.

These features occur in disk-shaped concretions in what we suspect are deep water turbidites. I have not seen the rock myself, and alI have is this picture. We are working on more precision on...

01 July 2014 5,932 15 View