A Nazi hiding hole in Middle Triassic rocks (Będzin, Poland)

June 20th, 2014

Tunnel bunker 062014SOSNOWIEC, POLAND — On my last full day in Poland, Michał Zatoń and his family took me on a tour of the city they live in and where my hotel is located: Będzin. The history of this place is very long, stretching back to the Neolithic, and for us it is dominated by World War II and the horrifying events that took place here from the earliest days of the war in 1939 until its liberation from the Germans in 1945. I thought I’d highlight one part of that history recently excavated and with a geological context.

The above view is looking down a tunnel in a complex bunker constructed by the Germans in 1944. Its purpose was to serve as a refuge from Allied bombing and reconnaissance flights near the end of the war. It had been sealed off and all but forgotten after the Germans retreated in 1945. The city of Będzin is now excavating it to be an underground museum. We were fortunate to have a private tour this morning.

Entrance bunker 062014These are the street level entrances into the bunker complex. You can see the solid rock outcrop behind the doorways.

Unfinished bunker 062014Much of the bunker is unfinished, like this portion. The steel arches are the modern effort to stabilize the roof and walls to make it safe for the public.

Fossilized cement 062014The Germans left in a hurry. This is a pile of unused bags of cement mix. In the decades since they were placed they have essentially fossilized into solid masses of concrete.

Muschelkalk bunker wall 062014This is the leading edge of construction where the concrete was laid against the rock wall. The reddish-yellow limestone is the Muschelkalk (Middle Triassic) unit we visited earlier this week. This is a strong rock suitable for tunneling because it can be easily carved out. This interval is probably equivalent to the crinoid-rich top of the Muschelkalk.

Nazis 062014This is one of the few photos made at the time in 1944 when the bunkers (although unfinished) were opened for use. It is taken from this website (in Polish). The man on the left (Hans Kowohl) was the mayor of the city, and the one in the middle was reportedly hanged as a war criminal in 1946, although I can find no mention of his identity.

Thus ends my Polish experience this summer with great colleagues, wonderful rocks and fossils, and a deep, often disturbing, history. I was challenged on many different levels.

Castles in Poland I expect, but a desert?

June 19th, 2014

Zamek Mirow 061914SOSNOWIEC, POLAND — Today my colleague Michał Zatoń took me and his family (wife Aneta and son Tomasz) on a tour of the Polish Jura, an upland with spectacular exposures of Jurassic rocks and the castles who love them. Above is the castle I consider most dramatic: Zamek Mirów from the 14th Century. Note the large mass of white bedrock at its base. This is a natural outcrop on which the castle was built. This will be a theme.

Mirow Oxfordian bioherms 061914Here we see a series of these white rocks jutting dramatically across the landscape. They are Upper Jurassic (Oxfordian) sponge-rich silicified limestones that grew as bioherms (organic mounds) on portions of seafloor elevated because of igneous intrusions below. The sponges loved being raised off the deep seabed and continued to grow upwards. Since many of them were siliceous sponges, after death their silica was mobilized into the surrounding sediment as a cement. This process produced these outcrops of very hard silicified limestones just waiting to host a castle or two.

Oxfordian limestone 061914Conveniently, the rocks can be quarried to produce the stones used in castle construction. Fossils are quite common in the building stones, like this ammonite external mold.

Zamek Bobolice 061914This is a reconstructed castle built on the outcrops.  (Zamek Bobolice; also 14th Century in origin.)

Zamek Smoleniu 061914Zamek Smoleniu was the smallest castle we visited, but somehow the scariest to climb. Getting to the top of that tower was a challenge.

Zamek Ogrodzieniec view 061914Zamek Ogrodzieniec was the largest and best known castle we visited today. It is haunted, but I ain’t scared.

Zamek Ogrodzieniec 061914The outer fortifications of Zamek Ogrodzieniec have very impressive outcrops of the Oxfordian silicified limestones.

Pustynia Bledowska 061914Now what about that mysterious Polish desert? Well, turns out it isn’t a desert in the official sense (it receives a lot of rain), but it sure looks like a desert. Pustynia Błędowska is its name in Polish. It is definitely an odd patch: 32 square kilometers in the midst of rich Polish pine forests. This place is so deserty that the German Afrika Korps trained here before going to northern Africa, and the Polish military uses it as a proxy for Middle Eastern situations. There is a lesson for humanity here as well: In the 13th and 14th Centuries the forest in this area was completely logged to provide charcoal for smelters producing silver and lead ingots. The removal of the trees exposed highly mobile glacial sands, which blew around enough to create dunes and soil too unstable for the trees to recolonize. This is a medieval ecological catastrophe. The Błędów Desert is now protected from human traffic so it has a chance to be absorbed back into the surrounding forests.

The Gleiwitz Incident completes the grim prologue

June 18th, 2014

Gliwice Tower 061814(It is the nature of this blog that our most recent entries are at the top, making it a bit awkward to read what is here the third part of a trilogy of posts today. You might want to start with my visit to Góra Świętej Anny.)

Above is a radio tower in Gliwice, Poland. It is an impressive construction in its own right, being made of wood with brass connectors in 1935 by Germans. It is the second tallest wooden structure (118 meters) in the world. How it survived World War II is a mystery to me.

This radio tower is famous for being the site of the Gleiwitz Incident on August 31, 1939. At the time Gleiwitz was within Germany near the Polish border. German SS troops staged a bloody attack on the radio station and tower to make it look like Polish Silesian nationalists were responsible. This was at least conceivable because of the tensions in Silesia between Germans and Poles for centuries, especially in the year after World War I. Of course, the Poles had nothing to do with the Gleiwitz violence. The Nazis used it as a pretext to attack and invade Poland on September 1, 1939. Last week my colleagues and I visited Westerplatte in Gdansk where the first “official” shots were fired. In some ways, though, the war started here.

Michal Tomasz Gliwice 061814Here are my patient and friendly colleagues Michał Zatoń and Tomasz Borszcz at the base of the Gliwice radio tower. They are very tolerant of my passion for history and geology.

 

 

Geology and nationalism at Góra Świętej Anny

June 18th, 2014

Google Earth 061814Geology, of course, is so much our fundamental basis for being that we rarely think about it. Occasionally, though, particular geological circumstances play direct roles in history. Today as I was visiting Góra Świętej Anny with my geologist friends I was intrigued by events that took place here in 1921 that provided another twist in the story that leads to the cataclysm of World War II.

The image at the top is from Google Earth showing the low prominence of Góra Świętej Anny in the center. It is not particularly high (just 406 meters), but it dominates the surrounding low countryside of fertile fields, productive mines, and scattered factories. As noted in our previous blog entry, Góra Świętej Anny is elevated because it has a core of resistant basalt from an extinct Paleogene volcano. It was an isolated volcano (the furthest eastern exposed basalt in Europe) and thus forms an isolated hill.
View 2 061814This is a view west from Góra Świętej Anny. The haze in the background is from large smokestacks on the right.
Silesian monument 1 061814On Góra Świętej Anny is the above monument to Polish Silesians who rebelled against the Germans throughout history (Teutonic knights are portrayed on the right panel), particularly during a 1921 battle on this elevation. The monument was dedicated in 1955 during “communist times” and shows many elements of Soviet-style design. It contains within it ashes from Poles killed in the Warsaw Uprising in 1945, and it is on the site of a German mausoleum that was dynamited to oblivion during liberation in 1945.
Silesian monument 2 061814These lead outlines represent Polish workers advancing against German troops in 1921 on Góra Świętej Anny. It is a story too complex for a blog entry, but here was the Battle of Annaberg between German Silesians and Polish Silesians during the Third Silesian Uprising. The Poles had taken this hill and defended it against an attack of German Freikorps, which were essentially World War I soldiers who had refused to demobilize in the chaos following the Armistice. The Poles were eventually forced off Góra Świętej Anny at great cost to the Germans. Later international commissions then divided up Silesia between Germans and Poles, with this area falling to the Germans. Polish Silesians, of course, took this very hard and continued to resist the Germans. Tension in this area eventually fed into pretexts for the German invasion of Poland in 1939, the start of World War II.
Nazi Amphiteater old imageGerman nationalists, many of them early members of the Nazi Party, wanted to make Góra Świętej Anny (or Annaberg, as they called it) a kind of shrine to their past and future efforts to make Silesia part of the Reich. They built a mausoleum (seen in the top right in this pre-war image) and a large amphitheater called a Thingstätte. The idea was to have Nazi rallies here with the dead from 1921 elevated above in some sort of Valhalla. The excavation of the amphitheater is what exposed the Middle Triassic Muschelkalk rocks for our study today.
Nazi amphitheater front 061814The amphitheater today survives for Polish festivals (it is a delight to hear the ring of schoolchildren’s voices here) and visiting geologists. (It is part of a geological interpretive trail). At the top of this view is the 1955 Polish monument on the site of the destroyed Nazi mausoleum.
Nazi amphitheater 061814The Germans cut most of the trees of the area down when they made the amphitheater. The Poles have allowed the forest to return. There is something profound about the peaceful, natural healing this reforestation represents.

The Triassic limestones at Góra Świętej Anny, Poland

June 18th, 2014

Gora sw. Anny signSOSNOWIEC, POLAND — My friends Michał Zatoń and Tomasz Borszcz took me on a very pleasant day trip to Góra Świętej Anny in southwestern Poland about an hour’s drive northwest from Sosnowiec. This is a place of considerable geological and historical interest. It is an eroded volcanic caldera and the easternmost occurrence of the fine-grained igneous rock basalt in Europe. You would think I’d be able to show you at least a bit of basalt, but we saw only the surrounding Middle Triassic limestone country rock. (Sorry, Dr. Pollock.) We’ll talk about the history later. Now we’ll look at the geology.

Muschelkalk long 061814Here is a great exposure of the Muschelkalk, a Middle Triassic sequence of limestones and dolomites that extends across central and western Europe. This is its best exposure in Poland. The rock appears very massive in this old quarried wall, but it actually has many distinct layers. Michał is standing at the top of stairs that lead down into a massive Nazi amphitheater called a Thingstätte, but more on this later.

Muschelkalk brachs 061814Part of the Muschelkalk unit is dominated by terebratulid brachiopods, many of which are seen on this slab.

Triassic encrinite 061814The topmost Muschelkalk here contains thick beds made primarily of crinoid skeletal debris, a kind of deposit known as an encrinite. We’ve seen encrinites before in this blog.

trace fossil sign 061814You don’t often see informative signs dedicated to the description of a trace fossil type. Rhizocorallium commune is the most common ichnofossil in this part of the Muschelkalk. It is a ropy, loopy tube produced in this case by crustaceans, probably including the decapod shrimp Pemphix.

Rhizocorallium 061814The slabs used to pave the walks and plazas in this area are filled with Rhizocorallium commune traces.

View 061814Finally, this is a view west from Góra Świętej Anny towards the Oder River. It is the highest place around, dominating this fertile valley rich with farms, mines and factories. This will be the reason it is so culturally and historically significant in Silesia.

A new Polish colleague (and cool dinosaur model)

June 17th, 2014

T rex 061714SOSNOWIEC, POLAND — The above full-scale model of Tyrannosaurus rex is one of my favorite dinosaur reconstructions. It sits in front of the Earth Sciences Building at the University of Silesia. Since it is outside the lighting is always dramatic, and the artists paid close attention to even tiny details like the reported coat of downy feathers on its back (see below).

T rex feathers 061714The roughening you see in the upper half of the image represents the feathery covering. We can only imagine what colors were present in the original.

Alina MW 061714Here is a new Polish colleague I met this morning. Alina Chrząstek is a paleontologist at the University of Wroclaw. She is a specialist in invertebrates and trace fossils. A few months ago she sent me photos of rock and fossil specimens she had questions about, and I told her we could meet when I was in Poland. She came today with boxes and bags of specimens, a few of which are shown below.

Erratics collection 061714These are glacial erratics from a moraine in southwestern Poland. They are rocks of a variety of types and ages scraped up by glaciers in the north and deposited in the south. Alina is sorting through what fossils are in them. It is a fun collection because it contains rocks from the Cambrian to the Cenozoic, with all manner of trace and body fossils. They can be quite a challenge to identify because the stratigraphic context is gone.

Half my day was spent writing, so I have nothing else to report. Tomorrow, though, is going to contain a field trip to the Góra Świętej Anny Mountain. (I hope everyone is noticing how hard I work at getting the Polish letters correct!)

Research begins in southern Poland

June 16th, 2014

Gillette 061614SOSNOWIEC, POLAND — On this beautiful day I began research at the University of Silesia with Michał Zatoń and Tomasz Borszcz in this impressive building. (It is reportedly the tallest Earth Science building in the world, although the Chinese are on the case.) Our first project, and the one I will devote most of my remaining Polish time to, is an analysis of fish-bitten echinoid (sea urchin) spines from the Middle Jurassic Matmor Formation of southern Israel (see below).

Spine 173_bittenWe have dozens of these crunched rhabdocidarid spines, which are critical evidence of early predation on regular echinoids. We hope our work will help illuminate the evolution of predator adaptations in the echinoids, and the actions of the hungry fish. More on this later.

Spines arrayed 061614Here we have a simple sorting of the spines in relation to their likely position on the echinoid test (body skeleton). Pretty simple, but it was an easy way for us to discuss spine morphology and function.

Michal office 061614To give you a glimpse of my new surroundings, here is a view of Michał’s office. As with every working paleontologist, there are plenty of specimens, books and papers!

Office view 061614The view from Michał’s office of Sosnowiec.

Silesia dorms 061614This is looking from Michał’s department building towards a series of dormitories for students at the University of Silesia.

Lunch 061614You know at some point I need to show some Polish food. This is today’s lunch. Note the crunchy latke and the pierogis. You pay for this food by its weight on the plate. This scrumptiousness plus a Sprite cost me $4.

Hotel Cumulus 061614This is my hotel in neighboring Będzin.

Hotel area Będzin Castle 061614Będzin Castle, which is a short walk from my hotel. You can expect a history post coming up soon!

 

Wooster’s Fossil of the Week: A geopetal structure in a boring from the Middle Jurassic of Israel

June 15th, 2014

Geopetal Structure 585We have a very simple trace and body fossil combination this week that provides a stratigraphic and structural geologic tool. Above is a bit of scleractinian coral from the Matmor Formation (Middle Jurassic, Callovian) of Makhtesh Gadol in southern Israel. The coral skeleton was originally made of aragonite. It has been since recrystallized into a coarse sparry calcite, so we can no longer see the internal skeletal details of the coral. In the middle of this polished cross-section is an elliptical hole. This is a boring made by a bivalve (the trace fossil Gastrochaenolites). Inside the boring you see a separate elliptical object: a cross-section of a bivalve shell. This could be the bivalve that made the boring or, more likely, a bivalve that later occupied the boring for a living refuge. This, then, is the trace fossil (Gastrochaenolites) and body fossil (the bivalve shell) juxtaposition.

That stratigraphic and structural interest is that the boring and the bivalve shell are partially filled with a yellow sediment. This sediment has gravitationally settled to the bottom of these cavities (at slightly different levels). These holes have thus acted as natural builders’ levels showing is which way was down and which was up at the time of deposition. We can tell without any clues from the recrystallized coral the “way up” before any later structural deformation (or in this case rolling around on the outcrop) changed the orientation of the coral. Pretty cool and simple, eh? The name for this feature is a geopetal structure. There are some faulted and folded sedimentary rock exposures in the world where we search diligently for these little clues to original orientation (see, for example, Klompmaker et al., 2013). Not all geopetal structures have fossil origins (i.e., Mozhen et al., 2010), but most do. A little gift from paleontology to its sister disciplines.

References:

Klompmaker, A.A., Ortiz, J.D. and Wells, N.A. 2013. How to explain a decapod crustacean diversity hotspot in a mid-Cretaceous coral reef. Palaeogeography, Palaeoclimatology, Palaeoecology 374: 256-273.
Mozhen, G., Chuanjiang, W., Guohui, Y., Xueqiang, S., Guohua, Z. and Xin, W. 2010. Features, origin and geological significance of geopetal structures in Carboniferous volcanic rocks in Niudong Block, Santanghu Basin. Marine Origin Petroleum Geology 3: 15.
Wieczorek, J. 1979. Geopetal structures as indicators of top and bottom. Annales de la Societé géologique de Pologne 49: 215-221.

Science fluorishes even on long train trips

June 15th, 2014

Tomasz 061514SOSNOWIEC, POLAND — Today my friend and colleague Tomasz Borszcz and I had a ten-hour train trip from Sopot to Sosnowiec in southern Poland. Our destination was the University of Silesia to meet with Michał Zatoń for research. I didn’t see any inspiring scenes from the train window, so I photographed Tomasz sitting opposite me. We had excellent conversations about many scientific topics of mutual interest. I was grateful for both his companonship and skills in knowing where this mysterious train was at any given time.

A day in Gdansk

June 14th, 2014

 

Vistula Gdansk 061414SOPOT, POLAND — It was a rainy, windy, cold day in northern Poland, but our able leader Piotr Kuklinski organized an enjoyable educational field trip to the ancient city of Gdansk, once known primarily by its German name, Danzig. The old parts of the city are gorgeous, especially considering that about 90% of the city was destroyed in World War II. Above is a view north of the Vistula River filled with hardy kayakers. While delightful, the city, cathedral and town hall views will not surprise anyone who has visited the old cities of eastern Europe. For me the best parts of the visit were when we saw places significant for recent Polish and world history.
Gdansk Armory 061414This 17th Century armory building is a good example of architecture in Gdansk at the height of its wealth and influence. It was built by Dutch engineers and builders using bricks brought as ship’s ballast from western Europe.
Westerplatte 061414We took a boat ride into the freezing wind and rain to see the monuments of Westerplatte at the mouth of the Vistula. This is where World War II began when German ships fired without warning on Polish fortifications in the early morning of September 1, 1939. The Polish garrison surprised everyone, especially the Germans, by holding out for seven days under terrific fire and continuous attacks. Above is a Soviet-style marker of the main center of resistance to the invaders.
Roads to Freedom exhibition 061414I was moved by our visit to the “Roads to Freedom” underground exhibition. It represents the history of Poland’s post-war struggles to escape Communist oppression and Soviet imperialism. A major theme is that actions of the Polish people in the 1970s, 1980s and 1990s encouraged the rest of Europe’s captive states to seek their own freedom and independence.

Militia vehicle 061414

A Polish militia armored vehicle sits outside the exhibition entrance. This kind of vehicle figures often in the exhibition’s archival films of street violence in Gdansk and other large cities.

Solidarity signs 061414The history of the Solidarity movement is one of the most dramatic stories of the late 20th Century.

Solidarity gate 061414This is the most famous gate into the Gdansk Shipyards, where Lech Walesa led striking workers into what eventually became a national resistance movement. Now under the awning on the right is a 24-hour ATM!

Fallen shipyard workers memorial 061414One of the demands of the striking workers is that they be allowed to construct a monument to their comrades who were killed in a previous strike in 1970. This is one of the plaques near the structure.

MW Berlin Wall 061414To show the global nature of the Polish political revolution, the exhibition organizers obtained a piece of the Berlin Wall to place outside the museum. Geologist for scale. (Thanks, Tomasz Borszcz, for the photo.) I remember the dramatic events televised from Gdansk and would have never dreamed in, say, 1983 that I would someday stand by a piece of a dismantled East German wall in the free city of Gdansk.

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