@billpincus.bsky.social
I am a professional geologist who has specialized in economic geology with an empahsis on the epithermal - porphyry environment. Looking to exchange ideas, photos, knowledge.
I live in Colorado and am re-teaching myself the local geology.
I live in Colorado and am re-teaching myself the local geology.
This is great but check out ROCKD. It’s a free app from University of Wisconsin geology department (although you can make a donation). It’s awesome.
September 8, 2025 at 11:54 PM
This is great but check out ROCKD. It’s a free app from University of Wisconsin geology department (although you can make a donation). It’s awesome.
Put a drop of hydrochloric acid on it. If it fizzes it’s calcite.
August 27, 2025 at 2:35 PM
Put a drop of hydrochloric acid on it. If it fizzes it’s calcite.
Concerned about what?
July 14, 2025 at 3:15 AM
Concerned about what?
What help is geology? Since graduating w a degree in geology 45 years ago I have been involved in the discovery of 8 ore deposits. Do you use a cell phone, drive a car or have you been treated for burns with silver impregnated bandages? Then you used the metals I helped find. You’re welcome.
June 2, 2025 at 11:27 PM
What help is geology? Since graduating w a degree in geology 45 years ago I have been involved in the discovery of 8 ore deposits. Do you use a cell phone, drive a car or have you been treated for burns with silver impregnated bandages? Then you used the metals I helped find. You’re welcome.
This is the Jurassic Navajo Sandstone that covers much of the southwest US. It is a wind-blown sand. What you are looking at is cross-bedding. In this case they are essentially fossilized sand dunes.
April 23, 2025 at 3:29 AM
This is the Jurassic Navajo Sandstone that covers much of the southwest US. It is a wind-blown sand. What you are looking at is cross-bedding. In this case they are essentially fossilized sand dunes.
When Laurasia and Gondwana came together it was called Pangea. So I guess the answer is yes two continents colliding become one new continent. But, of course they can break apart too. It’s an endless cycle.
March 24, 2025 at 2:13 PM
When Laurasia and Gondwana came together it was called Pangea. So I guess the answer is yes two continents colliding become one new continent. But, of course they can break apart too. It’s an endless cycle.
An 1815 version hangs in the lobby of the Geological Society of London. You should visit it. They were very nice to this visiting geologist.
March 24, 2025 at 2:02 PM
An 1815 version hangs in the lobby of the Geological Society of London. You should visit it. They were very nice to this visiting geologist.
The Richter scale has not been used for a very long time. The current standard and most commonly used is the moment magnitude scale.
Here’s a description: www.usgs.gov/faqs/moment-...
Here’s a description: www.usgs.gov/faqs/moment-...
Moment magnitude, Richter scale - what are the different magnitude scales, and why are there so many?
Earthquake size, as measured by the Richter Scale is a well known, but not well understood, concept. The idea of a logarithmic earthquake magnitude scale was first developed by Charles Richter in the ...
www.usgs.gov
March 9, 2025 at 9:06 PM
The Richter scale has not been used for a very long time. The current standard and most commonly used is the moment magnitude scale.
Here’s a description: www.usgs.gov/faqs/moment-...
Here’s a description: www.usgs.gov/faqs/moment-...
Just to be clear at this point in time Uk has exactly 0 rare earth metal reserves per USGS. Perhaps it does have potential but there is a long way to go to demonstrate that any significant rare earth metal can be produced.
March 2, 2025 at 4:15 AM
Just to be clear at this point in time Uk has exactly 0 rare earth metal reserves per USGS. Perhaps it does have potential but there is a long way to go to demonstrate that any significant rare earth metal can be produced.
Actually I very much doubt it. Hard to tell from photo but this appears to be an igneous rock. My first impression was that this is manganese oxide in a form known as dendritic growth. Much after the initial rock was formed water has moved along crack depositing the MnO2 in this form.
Landing
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February 28, 2025 at 10:45 PM
Actually I very much doubt it. Hard to tell from photo but this appears to be an igneous rock. My first impression was that this is manganese oxide in a form known as dendritic growth. Much after the initial rock was formed water has moved along crack depositing the MnO2 in this form.
JFK was a child during the Great Depression. You mean FDR. This was when radio was still a new medium.
February 27, 2025 at 3:58 PM
JFK was a child during the Great Depression. You mean FDR. This was when radio was still a new medium.
Cretaceous Kirtland Formation. geoinfo.nmt.edu/tour/home.cf...
Bisti/De-Na-Zin Wilderness
The country in northwestern New Mexico between Cuba and Farmington is a land of contrast. Flat grassy plains are cut by valleys that expose the multi-colored moonscapes that we call badlands. The larg...
geoinfo.nmt.edu
February 17, 2025 at 4:16 PM
Cretaceous Kirtland Formation. geoinfo.nmt.edu/tour/home.cf...
These are most likely preCambrian metamorphosed sedimentary rocks. They are 2.6 billion years old and are some of the oldest rock in the USA.
February 7, 2025 at 8:30 PM
These are most likely preCambrian metamorphosed sedimentary rocks. They are 2.6 billion years old and are some of the oldest rock in the USA.
As an economic geologist (fancy name for a prospector) I’d like to say that first, Canada has some of the best and most experienced geologist in the world. Second, finding a deposit and the building a mine is a very expensive and time-consuming process. “Just opening a mine” is not so simple.
February 7, 2025 at 7:16 PM
As an economic geologist (fancy name for a prospector) I’d like to say that first, Canada has some of the best and most experienced geologist in the world. Second, finding a deposit and the building a mine is a very expensive and time-consuming process. “Just opening a mine” is not so simple.
Actually, isn’t that geography not geology?
January 16, 2025 at 6:19 AM
Actually, isn’t that geography not geology?
Where on the Oregon coast?
January 16, 2025 at 6:16 AM
Where on the Oregon coast?
A good book on both subjects is “Timefulness” by Marcia Bjornerud. The book examines climate
change through geologic history. It’s written for the layman but has a fair amount of technical reasoning. Besides being a geology prof she is an elegant writer.
change through geologic history. It’s written for the layman but has a fair amount of technical reasoning. Besides being a geology prof she is an elegant writer.
November 29, 2024 at 8:15 PM
A good book on both subjects is “Timefulness” by Marcia Bjornerud. The book examines climate
change through geologic history. It’s written for the layman but has a fair amount of technical reasoning. Besides being a geology prof she is an elegant writer.
change through geologic history. It’s written for the layman but has a fair amount of technical reasoning. Besides being a geology prof she is an elegant writer.
BTW. The short answer is lots of volcanoes.
November 29, 2024 at 6:16 PM
BTW. The short answer is lots of volcanoes.
I don’t know your level of geologic training but for a good intro to Nevada try “Roadside Geology of Nevada.” Also try the Nevada Bureau of Mines and Geology website.
November 29, 2024 at 6:15 PM
I don’t know your level of geologic training but for a good intro to Nevada try “Roadside Geology of Nevada.” Also try the Nevada Bureau of Mines and Geology website.
Hard to tell, on closer inspection it looks like a finer-grained equivalent of the host rock but I would need to scratch, sniff and otherwise examine.
November 27, 2024 at 6:39 PM
Hard to tell, on closer inspection it looks like a finer-grained equivalent of the host rock but I would need to scratch, sniff and otherwise examine.
Looks about right.
November 27, 2024 at 5:35 PM
Looks about right.