Before the salt in evaporating sea water turns white, it goes through stages of color that range from jade green to brick red, with variations of orange, yellow and other colors. From above the salt ponds around San Francisco Bay look like giant panes of stained glass. The shot above is from my latest set, shot on approach to SFO last week.

Here’s another series.

Neither has a picture, either. I just checked my own 31,000-shot gallery, and didn’t find either one. I did find the great Phil Moore, however. Like I said at that link, one of my heroes.

Painted Cave. Lava Falls Trail. Uinkaret Volcanic Field. Nat Friedman. Denver International Airport. Sarah Lacy. Rainsford Island. Dorney Lake. David Boies. A peak above a glacier. Rim of the World Highway. Elena Kagan. Diablo Canyon Power Plant. Lake Havasu. Berneray, North Uist. Spectacle Island. San Gorgonio Mountain. River Nith. Paul Trevithick. Dumont Dunes. Tunitas Creek. Steve Gillmor. Boreray, North Uist. Guido van Rossum. Nunavut Shadows. Bristol Dry Lake. Brunswick Nuclear Generating Station.

All shots I’ve taken. All put in Wikimedia Commons, and (in nearly all cases above) in Wikipedia, by persons other than myself.

All I did was post them on Flickr, label and tag them well, so they could be found and used, via the Creative Commons Attribution Share-Alike license.

That’s just some of them, by the way. Lots more where they came from. One hundred and five, so far.

Above is the best (or the widest) shot I could get of Lake Manicouagan, which is the largest visible impact crater on Earth. Only three (or maybe four) are larger and none are visible.

The Manicouagan impact event happened about 214 million years ago, give or take. That was 14 million years before the end of the Triassic, which was first of the three “dinosaur ages” of the Mesozoic, an era that came to an end with the Chicxulub impact. Coming that far in advance the Manicouagan event  may not have been to blame for a mass extinction, but it wouldn’t have been pleasant.

There are better photos in the series, but it was a hazy day and the one above does the best job of showing the crater’s edges.

I’ve been wanting to see (and shoot) Manicouagan for many years, but routes and weather had never obliged before. This time they did, which was cool.

The shot above, made on Sunday out the window of a plane on approach to Las Vegas, comes three and a half years after this shot, which I took from the ground at Hoover Dam. Here’s a whole set of the fly-by. Not much of the dam shows. The Colorado River gorge is easier to see.

Two things stand out for me in this scene. One is the remarkable engineering involved in building the Mike O’Callaghan-Pat Tillman Memorial Bridge, better known as the Hoover Dam Bypass. The other is that, from altitude — far more than from the ground — you can see the volcanic nature and origin of the rock supporting both the bridge and hte dam. I’ve been looking around for source docs online that detail the provenance of this rock, which needs to be of a competence sufficient to anchor one of the world’s biggest dams, while also supporting a bridge over a gorge. As I recall from the visit, it’s rhyolite. But, not sure. Looks like it. Maybe Arizona Geology can fill us in.

Above is a picture of the Station Fire, taken from the plane I was riding from Santa Barbara to Denver on Monday afternoon. I believe the water body at the bottom is the San Gabriel Reservoir. It lies in the midst of the San Gabriel Mountains, most of which are in the Angeles National Forest, much of which got burned up in the last two weeks.

I didn’t see this scene myself, since I was seated on the left side of the plane, with a view of the Mojave desert. But I knew the fire was there, below the right side of the plane, which had a perfect view of the burn area. So I handed my camera over to people sitting on the right side, and they made the shots.

The fire has been burning itself out in the back country, which it was doing on Monday when that shot was taken. Current stats: 160,357 acres, 71% contained, 3,647 personnel, containment expected on Tuesday September 15th, 2009, at approximately 6:00 PM. (Yes, they’re that precise.)

Here’s my whole set of Station Fire-related images.

Why do mature redwood trees have trunks that rise two hundred feet before branches commence, live for centuries and have bark that’s a foot thick? Because they are adapted to fire.

Why does the silver-green chaparral that covers California’s hills and mountains burn so easily? Because it’s supposed to.

Why, other than its color, is the California Poppy such an appropriate flower for the Golden State? Because it is adapted to both fire and earthquakes. Says Wikipedia, “It grows well in disturbed areas and often recolonizes after fires”.

Of course, so do we. That’s why it’s not weird to find humans colonizing hillsides and other “disturbed areas” of California. Case in point: I am writing this in a house sited on an former landslide, not far from the perimeters of two wildfires that claimed hundreds of other houses in the past few months.

Every spot on Earth is temporary, but California is a special example. As permanence goes, California is a house of cards.

For example, take a look at some of the animations here, prepared by geologists at UCSB. Watch as a sheet of crust the size of a continent gets shoved under the western edge of North America. Debris that piled up in the trench where that happened is what we now call the Bay Area. Submerged crust that melted, rose and hardened under North America — and was just recently exposed — we now call the Sierras. Take a look at the last 20 million years of Southern California history. It’s a wreck that’s still going on. One section of that wreck is a bend along the boundary between plates of crust. Mountains pile up along that bend, like snow in front of a plow. The biggest of these ranges we call the San Gabriels. Those are on fire right now. Add up all the Southern California wildfires over the last twenty years and you’ll get a territory exceeding that of several smaller states.

My point is perspective. The human one is so brief that it can hardly take in the full scope of What’s Going On, or what our lives contribute to it. In a geological context, what we contribute are carbon and fossils. We do that by dying. Other planets have geologies as well, but none have marble, limestone, coal or oil. Those are all produced by dead plants and animals. It would be hard to make heat on Mars because — as far as we know — there is no dead stuff to burn.

Humans love to make structures and produce heat, which means we have an unusually strong appetite for dead stuff. Even cement and steel require dead stuff in their making.

If you fly a lot, as I do, you start to notice black lines on the landscape. These are coal trains that move like ant trails from mines in the West to power plants all over the country. The largest of these mines are in Wyoming, more than 50% of which has coal to burn. This coal consists of dead stuff that has been buried for dozens of millions of years, and took at least as long to form. In Uncommon Carriers, John McPhee says the largest power plant in Georgia, Plant Sherer, “burns nearly thirteen hundred coal trains a year—two thousand miles of coal cars, twelve million tons of the bedrock of Wyoming.”

Nothing wrong with that, of course, unless you’re not human.

From any scope wider than our own, we are a pestilential species. Since the human diaspora began spreading out of Africa only a few thousand generations ago, we have chewed our way through land and species at a rate without equal in the history of the Earth, which began 4.567 billion years ago, or more than a third of the way back to the start of the Universe. We are distinguished by our intelligence, our powers of speech and expression, our ability to use tools and to build things, our ability to learn and teach, and our diversity (no two of us, even twins, are exactly alike). There are 6.781 billion of us now. Few of us will live more than a hundred years, and fewer still will have more than a few decades to contribute more than carbon to the world.

Among the many recent developments in civilization, two stand out. One is a widespread realization that the effects of human activity on the planet are non-trivial. The other is a growing ability to connect with each other and communicate over any distance at very little cost. What will we do with this knowledge, and the ability to share it? Will we follow the model of civilizations that waste the places where they live? Or will we prove to be creatures who can change their nature and stop doing that?

The former is the way to bet. The latter is the way to go.

Bonus read: John McPhee’s The Control of Nature. A third of it is called “Los Angeles vs. The San Gabriel Mountains.” While it is mostly about “debris flows” — slow motion landslides — that happen during winter rains, the important part for today’s discussion involves a primary condition for those flows: mountain slopes denuded of vegetation by fires. This means you can count on many mudslides this coming winter.

When I read that an impact had been spotted on Jupiter, I figured it was somewhere other than the equator, which would be a bulls-eye. Even Shoemaker-Levy, a huge comet broken into a string of pieces, slammed like a series of machine gun bullets into Jupiter near its south pole.

But this one was bigger. See above. And read the story. That black hole in the side of Jupiter is nearly as big as our whole planet. [Woops, not quite. DFR points out in a comment below that the black spot is certainly a moon shadow. Jupiter has four big ones, they do make shadows like that, they are all on the planet’s equator, they’re all a good deal smaller than the Earth (being moons), and I should have known better. Anyway…

And nobody saw it coming.

One good thing is that Jupiter is kind of a crap sweeper, gliding around the inside edge of the outer solar system with a nice big gravitational field, sucking up debris that might otherwise clobber one of your inner planets, such as ours.

By the way, that bright point of light in the eastern sky these evenings is Jupiter. The smaller points of light on either side of it and close by are its moons. The clear-eyed can make them out on a dark night. And they’re quite obvious through good telescopes.

Oh, by the way, there’s a total solar eclipse happening right now in Asia. The NASA server with cool info seems to be hosed. So do some other sites I’ve checked (not that my connection is good right now… we’re back to high latencies again). But Shadow & Substance is on the scene and covering it live. Lots of fun stuff there.

I remember talking to Nick Givotovsky the first time at an early Internet Identity Workshop, when he pulled me aside to share some ideas, and immediately stripped my gears. The guy was as smart as they come, and articulate to an extreme equaled by few. I had to stop him every few sentences to get him to dumb it down a bit, or at least to let me catch up. Many conversations followed, in many settings. Every encounter with Nick was engaging and mind-sharpening.

We became friends — or as close as people get when they’re mutually engaged in a number of projects, and enjoy each other’s company, as well as each other’s minds and hearts. I called him “Nicky G.”

Best I can recall, Nick came to nearly every IIW, plus workshops on VRM, networking and much more. He always contributed, always brought a warm smile and good sense of humor. He was serious, but didn’t take himself too seriously. A rare combination. Also notable was Nick’s mode of engagement. He was always original, often challenging, but never hostile or obstructive. And his mind was always open, always curious, always ready to step up and participate.

As I recall, the last I saw Nick was at the IIW this past May. He left a bit early to get back to his farm in Cornwall, Connecticut. I remember him talking about this old tractor he had, and how much he enjoyed operating it. He died this last Friday after falling off (what I assume is) that tractor. More of the story is here and here. (I share those links there for the record, but they are not pleasant reading.)

Nick’s last post on one of the many lists in which he participated told the story of his older brother’s death. “I think he did it astonishingly ‘right’, if such a thing can be said of dying,” Nick wrote.

Alas, Nick died wrong. And way too young. He was just 44. He leaves his wife and two kids. Plus many shocked and saddened friends.

Hard to tell from the looks of these, but they’re columns in front of the Park Plaza Hotel in London. The rest of my London shots from last week are here.