Jim Wood
@sierrageology.bsky.social
Fieldtrips, Sierra Tertiary geology, railroad history, dry stone construction, lime kiln preservation, travel, cultural history of all sorts
My bsky name at gmail
December 2, 2025 at 11:10 PM
My bsky name at gmail
Im curious about the substitute pozzolan story.
December 2, 2025 at 9:52 PM
Im curious about the substitute pozzolan story.
Better grow your beard...fast!
December 1, 2025 at 4:57 AM
Better grow your beard...fast!
But we can rule that out because I don't think it floats.
November 29, 2025 at 12:26 AM
But we can rule that out because I don't think it floats.
Looks like a block of Aventurine.
November 29, 2025 at 12:22 AM
Looks like a block of Aventurine.
Time will tell. We're punting that conclusion to future generations.
November 25, 2025 at 4:17 PM
Time will tell. We're punting that conclusion to future generations.
Indeed, quite often I open up this app to see where that plane carrying all those travelers is headed. I vicariously travel that way.
But then, I'm brought back to reality when I realize the tons of greenhouse gasses that are injected into the atmosphere with that one flight! Alas
But then, I'm brought back to reality when I realize the tons of greenhouse gasses that are injected into the atmosphere with that one flight! Alas
November 25, 2025 at 4:11 PM
Indeed, quite often I open up this app to see where that plane carrying all those travelers is headed. I vicariously travel that way.
But then, I'm brought back to reality when I realize the tons of greenhouse gasses that are injected into the atmosphere with that one flight! Alas
But then, I'm brought back to reality when I realize the tons of greenhouse gasses that are injected into the atmosphere with that one flight! Alas
Probably this AirCanada flight that just passed to the west of you on its way Vancouver. The world seems big but is smaller than we realize.
November 25, 2025 at 3:31 PM
Probably this AirCanada flight that just passed to the west of you on its way Vancouver. The world seems big but is smaller than we realize.
Too bad that no mention of the fundraising effort of the Scottish Geological Trust.
November 24, 2025 at 10:16 PM
Too bad that no mention of the fundraising effort of the Scottish Geological Trust.
Indeed. The lighting of the pic looks like it is actually a painting.
November 24, 2025 at 1:36 AM
Indeed. The lighting of the pic looks like it is actually a painting.
Yes, they do!
But to us, its just sounds like a bunch of gobble-dy-gook.
But to us, its just sounds like a bunch of gobble-dy-gook.
November 22, 2025 at 8:49 PM
Yes, they do!
But to us, its just sounds like a bunch of gobble-dy-gook.
But to us, its just sounds like a bunch of gobble-dy-gook.
They look like pilaster facades, but must extend into the building some depth. Early version of 4x8 shear panels.
November 15, 2025 at 4:42 PM
They look like pilaster facades, but must extend into the building some depth. Early version of 4x8 shear panels.
You are preaching to the choir here! I hope to see this very topic presented at the International Festival of Stone next year in Dundee. If no one steps up, I'll do it. The theme is sustainability and circular economy of stone. Focus is on exterior landscapes.
November 15, 2025 at 3:22 PM
You are preaching to the choir here! I hope to see this very topic presented at the International Festival of Stone next year in Dundee. If no one steps up, I'll do it. The theme is sustainability and circular economy of stone. Focus is on exterior landscapes.
Fascinating stuff, this Pulhamite. Its longevity is apparently due to its composition based on lime or hydraulic lime. Some references say Portland cement.
Here is an authoritative reference...
web.archive.org/web/20151222...
Here is an authoritative reference...
web.archive.org/web/20151222...
web.archive.org
November 15, 2025 at 5:31 AM
Fascinating stuff, this Pulhamite. Its longevity is apparently due to its composition based on lime or hydraulic lime. Some references say Portland cement.
Here is an authoritative reference...
web.archive.org/web/20151222...
Here is an authoritative reference...
web.archive.org/web/20151222...
What? 1870s?
Hmm...they've outlasted many modern concrete bridges and embankment walls.
They don't make them like they used to.
Hmm...they've outlasted many modern concrete bridges and embankment walls.
They don't make them like they used to.
November 15, 2025 at 3:27 AM
What? 1870s?
Hmm...they've outlasted many modern concrete bridges and embankment walls.
They don't make them like they used to.
Hmm...they've outlasted many modern concrete bridges and embankment walls.
They don't make them like they used to.
Maybe they're on their way to Bodega Bay!
For the annual murder?
🤔
For the annual murder?
🤔
November 15, 2025 at 3:22 AM
Maybe they're on their way to Bodega Bay!
For the annual murder?
🤔
For the annual murder?
🤔
Left scheme. More contrast.
November 14, 2025 at 3:56 AM
Left scheme. More contrast.
The SF bobcats are wimps. Too much urban food available. Why work too hard for it?
November 11, 2025 at 8:18 PM
The SF bobcats are wimps. Too much urban food available. Why work too hard for it?
Not surprising, really. When the general population of a country in the modern age has lost its concern for even their local environment or nature, they arent likely to place much value or concern for issues in a foreign country that is out of sight, out of mind.
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Human connection to nature has declined 60% in 200 years, study finds
Prof Miles Richardson says people risk ‘extinction of experience’ in the natural world without new policies
www.theguardian.com
November 6, 2025 at 3:18 PM
Not surprising, really. When the general population of a country in the modern age has lost its concern for even their local environment or nature, they arent likely to place much value or concern for issues in a foreign country that is out of sight, out of mind.
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Thanks for posting this information. That's a unique kiln design with its subterranean circular access tunnel. Analogous to natural cavern bat habitat.
I've never thought about bats residing in our lime kiln but now I'm compelled to have a closer look in the nooks and crannies.
🤔
I've never thought about bats residing in our lime kiln but now I'm compelled to have a closer look in the nooks and crannies.
🤔
November 3, 2025 at 5:16 AM
Thanks for posting this information. That's a unique kiln design with its subterranean circular access tunnel. Analogous to natural cavern bat habitat.
I've never thought about bats residing in our lime kiln but now I'm compelled to have a closer look in the nooks and crannies.
🤔
I've never thought about bats residing in our lime kiln but now I'm compelled to have a closer look in the nooks and crannies.
🤔