Strike-Slip

Faulted layers

This is a really cool picture taken from the air above Pakistan. When rocks are bent, it can be a rough process. Rocks don’t bend easily, but instead will often break into small pieces. This area has been broken by well over a dozen faults while the nearby layers were folded and tilted.

This type of pervasive faulting occurs in a lot of places worldwide, but to show up like this takes special conditions. There can’t be too much vegetation, the rocks have to be tilted to show the correct faces, there’ can’t be too much rain to wash sediments away, and there can’t be too much soil developed on top.

-JBB

Image credit: https://www.flickr.com/photos/banco_imagenes_geologicas/5024042772

Geologic map of this area:
http://pubs.usgs.gov/of/2011/1093/

Today I heard from a colleague that I lost touch with a long time ago!  He’s now retired, but he’s been administering the scholarship program at the Northern California Geological Society.  Browsing through their website brought back a lot of memories.  Since I spent many childhood years in the San Francisco Bay area, the photos of the tectonic creep in downtown Hayward caused a few smiles.  Things are sill moving along in a right lateral way. 

Τhe Cephalonia Transform Fault and its extension to western Lefkada island (Greece)

The central area of the Ionian Islands is dominated by the existence of a major tectonic structure called the Cephalonia Transform Fault (CTF). Its main part (Cephalonia segment) has been identified by previous work based on the spatial distribution of earthquake foci, fault plane solutions of strong earthquakes, active tectonics, structural studies and geodetic measurements. This part (Cephalonia segment) which exhibits strike-slip motion with a thrust component, strikes in a NE direction, dips SE and has a length of ~90 km. In the present paper information concerning new fault plane solutions, orientation of isoseismals, sea bottom topography and recent GPS results are used to further check the properties of this southern part of the CTF and to explore its northeastward prolongation to Lefkada island. It is shown that the CTF is extended to the western coast of Lefkada. This northern branch (Lefkada segment) of the CTF which is also characterized by strike-slip motion with a thrust component, strikes in a NNE direction, dips to ESE and has a length of ~40 km. These two segments of the CTF form a major kinematic boundary where the slip rate is 2-3 cm/yr.

Untitled (Gun)

spark-plug peggy. met you at a house party. you told me how, growing up in manhattan, they’d put razorblades in halloween candy. how your grandfather broke every cherry sour in half on the counter with a sledgehammer, how they stuck to your shirtfront like skullshards. like broken brake-lights. how the counter was sticky for weeks.

fault-line lucy. my dead first girlfriend. you put your forehead against the wall. you know anything about the san andreas fault? how common seiches are? there are tsunamis way out in the ocean, some we don’t notice. the most dangerous part of an earthquake is when gas lines get cut. seismic-shift sydney. you said, san francisco burned for three days. somewhere in idaho underground caves were burning for years. there are too many earthquakes here. you moved to madison, wisconsin, where there aren’t earthquakes.

strike-slip sally. you found a boy. he looks like somebody’s lebanese nephew in the cinematic light of a jo-ann’s, feeling the plastic sheets over the father’s day cards. he knows how to properly salute. he’s hung from subway rails upside down, bleached his teeth, poured black things down drains. he feels you the way one feels a gun in its holster; that is to say, after a while, not at all.

land-slide sophie. I lied. I never came out to my parents. just waited until they were too embarassed to ask and then said it out loud, repeatedly. you told them everything while breaking bread mid-sacrament, before the amen. you set up a strip pole at the pulpit. broke up with nephew-boy in a blaze of glory. I am the constant state of an apollo 11 flag blown over by your exhaust. hello sunspot, hello grand jury. we found jerusalem. we made it all the way here, shouldn’t that be enough?

I found two major issues with this movie. They seem to think the California rift system is a subduction system. Also, an earthquake from that system would not cause a tsunami of any kind.

Answer to the subduction vs. slip-strike zones: It is possible that rifting, or even stress faults in Nevada and Arizona could prime or even ignite a major quake along the California rift system, which, by the way, originates off the coast of Costa Rica. I would even grant the creep-quakes as the priming factor.

As for the Tsunami, the answer to that would be a quake on the Juan de Fuca plate, where a volcano is currently making its presence known, this month. All it really takes for a volcano to burst forth like that is something to change within its magma chamber. This change usually makes it too small for what else is happening in there. If the California Rift were to ignite the way the movie portrays it, which could do it. Strike in the LA region, companion in the San Francisco region, then Boom, Juan de Fuca blows sending tsunamis across the Pacific in all directions. That I would buy for a double eagle.

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Tragedy- the corruption of good
When tragedy strikes we find ourselves slipping away from the person we once were. We become colder with every blow. Or we become better. The hurt remains but we become better people.

England v New Zealand: first Test, day three – live!

11.16am BST

81st over: New Zealand 322-2 (Taylor 56, Williamson 102) Thinking about it, it does make sense for Anderson to use up one over of the old ball for a loosener. The new ball takes effect straight away, the first ball full outside of,f speeding off the bat, through cover point and away for the first boundary of the day. Taylor is looking to score quickly off this, as he drops one into the off side and hustles through for a single. Williamson gets the strike and edges to slip, but he played it with such soft hands that it was never in danger of even coming close to carrying. England have three slips and a gully for Williamson, but Williamson still manages to find a gap between them, opening the face and getting two to backward point. New Zealand are eating up that deficit.

“Hi Dan.” Hi, Phil Russell. “On the subject on unfathomably popular songs, what’s the deal with Mustang Sally? Teeth-grindingly irritating rhythm, nonsensical lyrics and yet turns up on every compilation album and kareoke night going. Effectively it says: ‘See. I have a car, and look at me, I’m going drive it around a bit. I’m great, me.’ Garbage. Thanks for letting me get that off my chest.”

11.11am BST

80th over: New Zealand 315-2 (Taylor 51, Williamson 100) One last over with the old ball then I would imagine, given the cloud cover. These first three overs have been a bit of a miniature holding spell, you feel, before we get stuck into the real business. Taylor punches out to cover for a single and Williamson isn’t interested in doing anything but blocking the rest.

“The problem you’re going to have with The Frog Song,” writes Chris Bourne, “is that he likes to pick on a member of the audience wearing a leather jacket and make them come on the stage to hop up and down to the music. I’d call the whole thing off if I were you.”

11.08am BST

79th over: New Zealand 314-2 (Taylor 50, Williamson 100) This is a slightly odd one: Jimmy Anderson is going to have a bowl two overs before the new over is due. Williamson runs his second ball down to the vacant third man region and, though it doesn’t have enough on it to reach the boundary, he’s quick enough between the wickets to get three runs and move to an excellent hundred. That brings Taylor on strike and he turns a short one down to fine leg to bring up his own half century.

11.02am BST

78th over: New Zealand 310-2 (Taylor 49, Williamson 97) Moeen Ali will get things underway for England, with the new ball available in three overs’ time. Williamson gets the first runs of the day from the first ball, pushing it out to extra cover for two. Lord’s is certainly a lot duller than it was on days’ one and two, so that new ball could well be nasty to deal with. Williamson cuts behind point for two more to move to within four of his hundred. On the telly, Shane Warne makes the point that Ali should have a, er, point in place. There is a man in the position, but he’s right on the boundary. A full toss gets knocked to mid on for a single, then Taylor drives the final ball down to third man for two more.

@DanLucas86 I don’t mind “Jude” nor “Road” nor even “Mull”, but the hair. the hair…

10.57am BST

Here come the players…

10.55am BST

“Nothing wrong with going to the bar during ‘Hey Jude’,” writes Evelyn Williams. “I think the mistake would be in going to see Paul McCartney in the first place.” I actually prefer the Stones to the Beatles, but I’ve never seen McCartney. Also my friend brilliantly got tickets for £25.

@DanLucas86 considered opinion is he ruins Hey Jude the second he starts shouting.

@DanLucas86 mind you, surely everyone will head to the bar during The Frog Chorus, so Hey Jude is a good idea. Unless it is the encore.

@guardian_sport @DanLucas86 lets hope its not a shambles again by @englandcricket,yesterday was very poor

10.44am BST

@DanLucas86 After a spectacular morning, clouds have rolled in across St John’s Wood but it’s warmer than yesterday and it might swing.

Indeed, that did make choosing a jacket to wear today a tough choice this morning (I went with the leather one, sartorial experts). The forecast is for the clouds to get heavier throughout the day, then they might lighten up for the final session. The good news is that we’re not expecting any rain.

10.36am BST

So the cricket. From a neutral perspective, it would be lovely to see Kane Williamson be the first batsman in this Test to go on and make a monster of a score. The guy is an outstanding talent and a proper all-round batsman, capable of batting in any situation in any form of the game. There was THAT balls-of-steel shot in the World Cup, too, which instantly endeared him to every non-Australian around the globe. He’s going to break a fair few records, this kid.

10.30am BST

Before we get stuck into the cricket though, time for iconoclast’s corner. I’m off to see Paul McCartney tonight; is it wrong that I’m planning my trip to the bar during Hey Jude? I figured it’ll be a short queue as everyone will be busy sticking two thumbs up, plus I hate Hey Jude.

10.24am BST

Morning folks. Well this is all rather glorious, isn’t it? Obviously not if you’re an England fan, but, judging by the OBO correspondence so far, it seems a fair few of you are disengaged from the team. While this may be a sad state of affairs, it does at least give us leeway to revel in the excellent cricket that’s been on show so far.

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