sethoflagos

... that can't be explained by the national general ESE dip in sedimentary structures? Different thread maybe? You've strayed a very long way from rotational shear landslides that had perhaps some tangential relevance to the OP. ... or to put it another way: This isn't firmly established science. It belongs in Speculations.

Yes. It's the shared geological heritage of most of England, Wales, and Eire save for bits of Cornwall and the bottom half of the Isle of Wight which we gained a little later from the Normannian terrane. It's just a really strange way of putting it. At exactly which horizon do you suggest it stops being Dorset? Surely not the 2,000 m thick Triassic Sherwood Sandstone Group of the New Red Sandstone that outcrops famously at Budleigh Salterton and (obviously) Sherwood Forest among many other locations? Or the underlying Devonian marine cousins of the Old Red Sandstone supergroup that Dorset shares with... well, Devon? I can understand you thinking that Dorset is something special geologically: it is! I spent many happy hours fossil hunting Black Ven. But treating it as an isolated little island like Big Island Hawaii (that really is only 400,000 years old) risks losing all context of its rich shared history with the rest of the country, which really is a lost teaching opportunity. Plus, given recent events, if we don't nail our flag to the underneath bits, Trump's likely to send Thunderbird's Mole unit in to annex it.

Surely this only applies to the surface geology of Dorset. At depth, it's underlain by a continental crystalline basement of up to 1bya followed by a great depth of later sediments. See Wikipedia entry on the London-Brabant Massif, particularly the 'Formation' section.

I find the ratio of latent heat of vapourisation to surface tension quite a fascinating subject. You can just about measure reasonable values for each in kitchen experiments and they yield an interesting probe into molecular scale. Take a sphere containing a gram mole of water. It has a: Volume of 0.000018 m3 Radius of 0.01626 m Surface area of 0.003321 m2 This sphere can be subdivided (bear with me) into n3 spheres of radius/n and n times the total surface area. Now taking: Molar latent heat of 40,700 J mol-1 Surface tension of 0.0725 Nm-1 = Jm-2 Yielding a ratio of 561,379 m2mol-1 Taking the ratio of this to the molar surface area quoted above we get the following estimates: n = 169,039,238 Particle radius = 0.0962 m-9 Number of particles = 4.83 * 1024 Getting within 1% of the OH bond length is mainly coincidental I suspect, but the 8-fold overestimate of Avogadro's, (corresponding to n being out by a factor of almost exactly 2.0) is also curious.

Reminds me of a less than positive interaction I had with a client 'engineer' many moons ago. He'd been tasked with reviewing a rather in depth pump calculation I'd done. Now I'm generally quite meticulous in keeping track of units in formal calculations, but there was one quantity, pump specific speed, where I'd left the number undimensioned. He asked that I add the dimensions. I replied that they wouldn't help anybody. He insisted. I added the units: rpm gpm0.5 ft-0.75 (L0.75 T-1.5) He stormed off accusing me of taking the p**s out of him. The relationship didn't improve over time.

Not tried the thymus version yet. I would, but it would have to be the right place, I think. In fairness, I should have given a shout out to the Zebra i Kosci restaurant. Truly special, not overly expensive, and no more than 50 paces from the Polonia Palace Hotel, which itself has an interesting if somewhat dark history. But I suppose the same could be said for any building in Warsaw that survived the uprising.

Earth.comRemote volcano wakes up after 700,000 years of dormant si...Taftan volcano in southeastern Iran rose 3.5 inches over 10 months, signaling that it is waking up after 700,000 years of dormancy.A vale of foe! Lava!

Don't forget that from a thermodynamics pov, surface tension and surface energy are basically the same thing, applied to fluids and solids respectively for historic reasons. Leastwise, the surface tension (N/m) and surface energy (J/m2) of water have the same numerical value (~ 0.0725), which is only 10% or so less than that of soda glass. Which is one reason why under certain circumstances, Navier-Stokes ceases to apply and their 'fracture' mechanism can become comparable. Yes, it's true that on a metre scale with a Bond number ~104+, then gravitational forces will dominate. But surface tension effects never go away, and around the centimetre scale (Bond number ~ 1) they become comparable (ie a chemical engineer ignores one of the pair at his peril). Chem Eng humour includes defining the inverse of the Bond number as the 'Jesus number' since having a large one may enable you to walk on water. You've got to find something to laugh at when designing gas flotation units for effluent treatment works.

You got me thinking. It's true as you say about Archimedean buoyancy, but it does affect the (much smaller) amount of nett uplift he would get from surface energy differences due to the local radius of curvature of the interface. Per the Kelvin equation, a long thin cylinder is about the optimum geometry for this. More so if he rubs on a thin layer of goosefat to increase the difference between cohesive and adhesive forces at the interface. A somewhat rounded figure may also help as AFAICT, a flat faced cube would only get a little uplift along the edges.

As we approach the end of our visit to Poland, Mrs Seth and I decided to take the plunge tonight and ordered a dish of veal sweetbreads as a shared starter course. Flambéed and served in a rich creamy mushroom sauce, they were quite delicious.

I was born in York, the UK's 'quaintest' city, and know of what I speak. Spaces such as this are invariably populated by supermarkets, banks, fast food franchises and similar commercial ordure. No sense of community whatsoever.

They Were LYING!! Part 79 of 1,056 Parts of Eastern Europe are actually very pleasant. Old Town Square, Poznan, Poland. Can't think of anywhere in the UK that can hold a candle to this.

I agree. Though I imagine that the freshly fractured water surfaces would be buried within a highly energetic aerosol mist that would be quite the reverse of smooth. The polar opposite ratio of surface tension to viscosity makes bitumen less inclined to go as far as aerosol formation, and far less eager to revert so rapidly from rough to smooth. The appropriate scaling factors (Laplace number, Bond number, Cavitation number, Ohnesorge number) span many orders of magnitude, so 'instant' is quite a relative concept.

I think the give away is that the OP reference fails to mention and distinguish their subject from Liquid Column Separation despite that being quite literally what they are describing. Of course, this doesn't prove they're the same thing, but then there'd have to be two phenomena the research team had never heard of. AFAIK only Chem Eng give it any serious study time. The equations are non-analytic which puts off most but since it's very effective at straightening piping elbows etc we have to look at it. And who else would stick a waterfall in a pipeline?

Think of two large diameter pistons face to face, with a liquid film bond between them. Air pressure on the external surfaces opposes rapid separation. If the pistons are drawn apart slowly, the fluid pinches in at the circumference and gradually separates from the edge to the centre with no velocity discontinuity. The growing space between the separated films is occupied by air. As more separation force is applied exceeding the sum of external pressure and van der Waals, the interface begins separating faster than air can fill the space, forming a vacuum and velocity discontinuity followed by a bang as the air catches up. Generally the pressure within the film will dip below its vapour pressure and boil a bit reducing the degree of banginess (basis of cavitation). Certain non-Newtonian fluids will like crystalline solids, support significant negative pressures in tension with consequent increased 'banginess'. All I'm really seeing here are the underlying physics of Water Hammer and Liquid Column Separation Tensile behaviour of elastic fluids covers some of the more polymery associated behaviours.