Barry Goldman

@barrygoldman1.bsky.social

was studying origins of life, that got too narrow, now studying #Geology. ... maybe this time i'll regularly post original content, what should i write? https://blackskimmer.blogspot.com/2018/07/finally-i-can-post-my-science-salon.htm #Astrobiology

This earthquake in Panama is the 12th earthquake of magnitude 7 or greater this year. Is this an unusual number of large quakes? No. This graph shows M7+ earthquakes over the last 30 years. This year is very average.

This graph shows earthquakes of magnitude seven or greater since 1996.

my BIGGEST flooding pet peeve on full display. DO NOT DRIVE ON FLOODED ROADS. PERIOD. Not for your car's sake I couldn't give a fuck about your car. But every little wake you send out to the roadside could make the 1 or 2 inch difference between someones house getting water inside or not.

#MinCup26 Yay quartz. Here r some tiny 'herkimers' growing with calcite in a seam. Helderberg formation Coeymans NY, usa

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Mineral Cup & Ore Cup@mineralcup.bsky.social · last wk.

Congratulations, Quartz! After a decade of #MinCup, this key rock-forming mineral of optical tricks is the #MinCup26 Champion! Due to intense manipulation attempts in the final hours, the exact winning margin is still being audited. Please join us tomorrow for celebration!

A clear double-terminated quartz crystal with petroleum inclusions. Credit: John Sobolewski

I'm obviously biased because I study Mimas (and Herschel specifically), but this little moon really is incredibly interesting and unique. There's a lot we can learn from its cratering record about whether it may actually be a "stealth" ocean world (one whose ocean seems missing at first glance).

Cassini's two highest-resolution views from its 13 February 2010 flyby of Mimas caught the southern half of the crater Herschel and an area to its east. This view is composed of two clear-filter images taken from the raw JPEG website. They were rotated to put north up and their levels adjusted to make the coloration fairly continuous. The interior of Herschel is covered in what appears to be post-formation modification. Credit: NASA / JPL-Caltech / SSI / mosaic by Emily LakdawallaAnother Cassini image, this one from farther away in 2005. Herschel lies on the terminator of Mimas in this image, keeping the entire crater floor in shadow with the exception of the central peak. The overall effect is mildly menacing.
Planetary Crater Consortium@planetarycraters.bsky.social · 2w ago

Crater Fact Friday ☄️DID YOU KNOW☄️ that Saturn's moon Mimas looks like the Death Star? The iconic crater that gives it this appearance is Herschel, and its sharp central peak and steep walls may tell us about the age of a potential ocean deep beneath the surface!

Image of a moon that looks like the death star but is a real moon. Surface covered in many craters with a large prominent crater (Herschel crater) on the right with a large central peak.

@brandontbishop.bsky.social do you know who is good at mineral id? the 2nd mineral gave wonky scratch tests... hardness... 4-7? can't remember. i have more photos..

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Barry Goldman@barrygoldman1.bsky.social · 2w ago

#MinCup26 graphite??? wait wait wait i have collected a cool graphite! these two samples were from Warwick NY, in the far north end of the famous Franklin marble location. first is marble with graphite flakes. never had found graphite before. 2nd is a mystery mineral. hardness tests wonky.

#MinCup26 graphite??? wait wait wait i have collected a cool graphite! these two samples were from Warwick NY, in the far north end of the famous Franklin marble location. first is marble with graphite flakes. never had found graphite before. 2nd is a mystery mineral. hardness tests wonky.

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While peptidoglycan (PG) is an essential and near-universal feature of Bacteria, it is largely absent in Archaea. A notable exception is a large clade of methane-producing archaea, which possess a cell wall with a distinct type of PG (also known as pseudomurein) 2/9

Scanning Electron Microscopy of Methanobrevibacter smithii, the main species of archaea from the human gut. Taken from https://doi.org/10.1016/j.tim.2025.10.003