uniqueid198x

joined 1 year ago
[–] [email protected] 13 points 11 months ago (2 children)

Correction: they were all incompetant traitors

[–] [email protected] 7 points 11 months ago

Mountain bases can support a lot. Everest is not terribly tall from its base, true, but Denali is 5500 meters from base to top and Mauna Kea rises to 10000 meters over base.

Its also a bit of an incorrect picure to think of the interior magma as a liquid. It can flow, but it can also sieze up or crack. Its an in-between, like corn starch and water.

[–] [email protected] 9 points 11 months ago

What we see now are the ancient roots. Before the continental colision, there was a sea and subduction zone. This gave us sandstones, diorite, and granite... All of which were crushed at incredible pressure and temperature by the continental collision. At the deep roots of the mountains, this transformed the rock into gneiss, marble, and other extremely hard rock. Additionally, the forces were so great that the very bottom melted and became fresh granite.

All of these stones are very hard and resistant to erosion, and are what we see todayas the Appalachians

[–] [email protected] 6 points 11 months ago

Its indirectly gravity. The taller the mountain, the more eroding force can be pleced on it. Water travels faster and therefore cuts deeper.

Everest is still uplifting fairly quickly at 1mm a year, but its also eroding at roughly the same pace and won't get significantly taller than it is now. The same is true for the rest of the Himalaya as well, the whole range is eroding at a very high pace.

The Himalaya are home to some very spectacular canyons, including the largest canyon above water. The geology there is on full display and incredible.

[–] [email protected] 11 points 11 months ago (8 children)

I have started daydreaming of a career change to geology. There are just so many unanswered questions and its not like space or physics were these questions are tinyor super far away. You can just walk upto a geologic puzzle and hit it with a hammer.

[–] [email protected] 2 points 11 months ago

Ok yeah this was good

[–] [email protected] 17 points 11 months ago

One nit, pangea wasn't the first supercontinent, we know of at least two, maybe three before it. The stone of the Adirondak mountains was formed as part of the Grenville mountains, which were built by a suprecontinent 1.5 billion years ago (the adirondaks got tall be'ause of a much more recent, unrelated thing, but their stone is very old). The Grenville runs from Hudson Bay to Texas

[–] [email protected] 10 points 11 months ago

Completely unrelated. North and south america wern't attached when the appalachians were tall. The Andes are formed by an ocean plate (the Nazca plate) dragging as it is sucked under south america. They are tall, and still growing taller.

[–] [email protected] 16 points 11 months ago (5 children)

This is because thats basically the upper limit for how tall a mountain can be on this planet.

[–] [email protected] 104 points 11 months ago (10 children)

Small? The Appalachians today are the resting skeleton of a mountain range so tall and enduring that the mud and sand that washed off them piled miles high and formed the Catskill mountains. The Appalachians were so mighty that their garbage formed mountains

[–] [email protected] 8 points 11 months ago

Its been the standard in Europe also. This has been changing, but only recently.

[–] [email protected] 2 points 11 months ago (1 children)

Yes, it is still a quartz watch. The oscillator is still a quartz oscillator. However the mechanism which advances the second hand is replaced with onethat does not need to tick.

The kind of quartz watch is no longer a ticking quartz watch, it is a non-ticking quartz watch.

As for the specific wording of the article, I would assume the authoris not fully versed in partsof quartz watches, and does not know that the oscillator which keeps time is different from the stepping motor which moves the hands.

This invention targets only replacing the stepping motor, not the oscillator.

view more: ‹ prev next ›