#Exposed Rock

[bal0neymalon3y]

Underground office workspace in Bahnhof Pionen data centre, Stockholm, Sweden

[oldfarmhouse]

https://www.instagram.com/cottonwoodandco

[jedi-starbird]

fellas. fellas. listen. qui-gon does express affection towards obi-wan, he just does it in the divorced dad way.

that's his love language, despite never having been married, divorced or had a kid.

[iamthepulta]

@joemomrgneissguy SPACE MINING. HO BOY.

So when mining comes into a conversation, there are several 'laws' of mining and processing that I like to consider that people tend to forget:

Location and rarity of commodity

Location and rarity of extraction techniques/reagents

What is necessary for this operation to work?

Where does the finished product go?

Some of these are extraneous. Theoretically, we don't have to care that iron is common on earth and might be present on the moon, so it changes the conversation from "why?" to "how would we?". Same with extraction and reagents. If you don't care how expensive it is to ship- for example: water and carbon dioxide to the moon because you want to process He-3, nothing can stop you.

However, what will stop planning, is processing. Blowing up a rock is easy. Collecting the rock and breaking it into a usable form is not. If there isn't a plan for exactly what commodity is being mined and how to separate it and all the equipment that needs to be made to get it into a usable form, and a plan to get that equipment into space. God help the poor bastard.

And fundamentally, no matter HOW you turn it, people use the finished product. If there are no people where you are mining the Thing, you need to have a way for the Thing to get back to the people who need it. WHY are you mining the Thing? What is economic about the Thing being made? and Is it worth the money?

[angry geologist rant under the cut]

So the thing about space and asteroids is metals come in native form a lot of the time because there's nothing to oxidize them; it makes processing simpler and the density increases profit. This is usually what people talk about when they go off about space mining: Ohh, if we just reach this asteroid 400 years away there's so much Gold and Platinum! Ohh, if we just crashed a FUCKING ASTEROID INTO EARTH OR MARS we could be so rich!

However this is a LIE for two reasons: It's actually harder to process straight sulfides or straight metal because they aren't brittle. Instead of breaking into smaller pieces you can separate and process, they jam the crusher. Universities with mining departments often have huge chunks of impressive high-grade sitting around that were donated by companies when they jammed their fucking system. If you can't break it down, it's a useless fucking clump of rock.

Secondly, even if you have native metals clumped together like an iron-nickel asteroid, unless you want an iron-nickel product, you have to separate them. Since it's not brittle, you would have to pour a bunch of hydrochloric on it and wait for the reaction to dissolve the outer surface.

And all this is assuming the metals are on Earth. If not, you have to figure out how to do this in space. How much HCl will you need? How are you going to fly it up there? How are you going to break it down? How are you going to replace parts when they inevitably break?

The big "commodity" on the moon is Helium-3, which is extremely rare on Earth. (So yes, we have a need, and yes, there's substantial reason to mine it in a place where it's more accessible.) The logic starts breaking down around "getting it back" and "how does the operation work": In moon quantities (up to 15 parts per billion (ppb)), you have to mine about 150 tons to extract 1g of He-3. That's not unreasonable, to be honest, since economic gold hovers around 7-12 ppb. And technically you'd only have to heat the rock to 600-700 C. However, things do melt at those temperatures. Then you have to get it back to earth. Either a SpaceX-style return and come back, or a drop shipments- It's just insane to me though that we would use SO MANY RESOURCES to rip up the fucking moon, even with an automated system, when if you look at He-3 we already produce what equals 11 pounds of He-3 yearly from Oil and Gas deposits, it's just not collected.

I have more beef with planets that are theoretically resource-rich, but people just- don't care about getting them back to Earth? Venus has significant metal-Sulfides and Tellurides in its atmosphere, which is why people joke about the "floating oxygen colonies" on Venus. But congratulations! You've colonized a planet that is inaccessible to human technology because anything we've ever designed will dissolve. Same with Europa. To design something that works on Venus - not to mention extracts things in the proper form to be used in human conditions - and/or get them back to Earth means redesigning how we think of the properties of the periodic table.

With extraction, we play a lot with oxidation states, and one of the rules is to stay within Earth's aqueous conditions. If you oxidize anything too much, your solution will want to vaporize to oxygen. Reduce anything too much, and your solution will want to vaporize to hydrogen gas.

So, if you design anything on Earth designed for conditions on Venus, it will be unstable. If you design anything on Venus meant for Earth, it will be unstable.

Which is kind of the end of my rant, I guess. Don't crash something into Earth unless you can process it. If you can process it in space, can you get it back? Who's responsible when the thing breaks? Why the fuck is money being spent when 9 times out of 10 we have it here on earth with the conditions we're familiar with?

If we've somehow depleted Earth enough that we need resources from other planets, which would insinuate we have not figured out how to recycle our own metals, which is untrue, and likewise we have no business in space anyway- Where did all our resources go? Are we leaving for those other planets? Do we have faster-than-light travel to collect the new resources in a timely manner?

There isn't even water in space half the time and if you do have a colony on Mars and tech bros are going to process all the hematite to build their shitty underground Martian city, are they shipping water from the north and south poles to do this? Have they figured out how to renew the carbon filters that are going to be needed to get all the waste and organics out of it once it's used?

In my opinion, it's all just fucking stupid. Space mining tries to answer a question that doesn't need to be asked with people who don't know how mineral processing works who haven't thought what the logistics require and don't care that entropy demands even minerals in stasis don't last forever. But it's ~new~ and the dollar signs on metallic asteroids gleam in their eyes and I want to take out Elon Musk's kneecaps.

[juney-blues]

"no see they're not being transmisogynistic, they don't hate trans women! they're specifcially talking about *men*, and trans women aren't men! so no one would EVER refer to them as such"

wow you're sooo smart, you're so smart and understanding, your brain is huge y'know that. you're sooooo intelligent and thoughtful and you really get it y'know, you smart person you.

[haunted-xander]

I'm not the only one who thought of this surely...?

[anabellesissy]

[loxare]

do i.. WANT to know about the drumlins?

YES YOU DO

Drumlins are glacial landforms, which means you find them only in places that have been glaciated. And they're very distinct when you know what you're looking for.

A hill with one steep side, one looooong sloping side, and you've (most likely) got yourself a drumlin. (Unless it's small. Drumlins are tens of meters high and hundreds of meters long, so if you've got a short one with way more elongation, you've got a drumlinoid.) They're all over Canada,the north eastern US, and northern Europe. The one pictured above is in Ireland. The ones in Canada and the US formed as the Laurentide Ice Sheet, a kilometers thick mass of glacial ice, was spreading across North America during the Last Glacial Maximum

There are lots of really cool glacial landforms (eskers and kames and lakes (Glacial Lake Agassiz my beloved) and like a dozen types of moraine), but drumlins are my favourite because they're so incredibly easy to identify, they occur in swarms, and they're kinda weird as hell

There's still some debate among geomorphologists about how, exactly, they form but I was told that the (mindbogglingly huge mass of) ice catches on a sticky uppy bit of bedrock and instead of mowing it down like a child kicking over a stack of blocks, moves around it instead. And because there's now a place behind the bedrock where there's less ice, the ice drops a whole bunch of glacial till (all the bits of sediment that did get mowed down like a child kicking over a stack of blocks) on the other side of the bedrock bit

(This is a constructional theory, where the drumlin is built up. the other main one is the erosional theory, where everything but the drumlin is eroded. There's also a theory that drumlins are deposited by subglacial meltwater, but that one is highly controversial)

"Now wait," I hear you say, "go back a bit. What the fuck was that about swarms?"

They occur in swarms.

If you've got one drumlin, good chances you've got a lot of drumlins. Which is actually amazing, because the steep side of the drumlin faces the direction of flow, which means we know exactly how the ice sheet moved. In this image, for example, the ice started at the top, near Lake Ontario, and then moved south. From looking at drumlins (and other glacial landforms, we do like to have multiple reference points), we know that the Laurentide Ice Sheet started in the Hudson Bay and crept out from there

And because they're so distinct (tear drop shaped, made of till, occur in swarms), and because drumlins can only have been made by glacial activity, we can look all over the world and find these things and know that this place was once under several thousand tonnes of ice

Not during the Last Glacial Maximum, but definitely ones before it. And I just think that's neat

[supermen-with-black-hair]

The more you see,

The more you want.

Especially if we’re talking about

Me. 

나, 멋지? 이사공칠공사

[witchrealms]

x x

[cabeswaterdrowned]

Gansey and Ronan having opposite music tastes and then Adam’s the perfect neutral because he has no music tastes he just likes that they like what they like

[your-stranger-halfblood-things]

Whenever Will is slouching or staring off into space, Mike will walk up to him, do his best Bowie voice and say "babe, you're looking sad today" while caressing his cheek before kissing him just because he knows he's so bad at doing Bowie's voice and it always makes Will laugh

[oldfarmhouse]

https://www.pinterest.com.

[fractoluminescence]

When I scrolled by a retweet of another Q&A translation mentioning an underwear question I'll admit this was not what I thought the post it was potentially talking about would be like

[blueiscoool]

Amazon Drought Exposes Ancient Rock Carvings

Human faces sculpted into stone up to 2,000 years ago have appeared on a rocky outcropping along the Amazon River since water levels dropped to record lows in the region’s worst drought in more than a century.

Some rock carvings had been sighted before but now there is a greater variety that will help researchers establish their origins, archaeologist Jaime de Santana Oliveira said on Monday.

One area shows smooth grooves in the rock thought to be where Indigenous inhabitants once sharpened their arrows and spears long before Europeans arrived.

“The engravings are prehistoric, or precolonial. We cannot date them exactly, but based on evidence of human occupation of the area, we believe they are about 1,000 to 2,000 years old,” Oliveira said in an interview.

The rocky point is called Ponto das Lajes on the north shore of the Amazon near where the Rio Negro and Solimões rivers join.

Oliveira said the carvings were first seen there in 2010, but this year’s drought has been more severe, with the Rio Negro dropping 15 meters (49.2 feet) since July, exposing vast expanses of rocks and sand where there had been no beaches.

“This time we found not just more carvings but the sculpture of a human face cut into the rock,” said Oliveira, who works for the National Historic and Artistic Heritage Institute (IPHAN) that oversees the preservation of historic sites.

[angelbambisworld]

"Little girl...What would you like for Christmas?"

😳You to stop talking like that before I come over there and ride you like a goddamn horse in a rodeo😳