This week’s centerfault is a very prominent one that you will know for sure – the Dead Sea Fault. The sinistral strike-slip fault marks the boundary between the Arabian plate and the Sinai. The entire system is more than 600 km long and has accommodated ~107 km of slip since Miocene. Magnitude 7 is no problem for this structure and the recurrence intervalls are short. Continue reading “The Wednesday Centerfault (7)”
In April 2011 we started on a field trip to investigate the Padul-Nigüelas Fault Zone in Spain (+/- 37°N, 3°36°W, see map here). Like the Wednesday Centerfault (5), the PNFZ is in the Granada Basin but some 40 km ENE. Delimiting Tortonian to Quaternary basin fillings to the Sierra Nevada, the PNFZ forms hardrock scarps. Continue reading “Young Geologists – New Insights (1)”
Dear colleagues and friends,
the registration for the Corinth2011 workshop is open again. Due to additional capacities at the conference venue we can offer 20 more places! You can register via the paleoseismicity.org website. However, the abstract submission is closed. Don’t hesitate to contact us if you have any questions.
Have a nice weekend and looking forward to seeing you in Corinth,
The Organization Committee
After we dealt with some faults in Greece, let’s move to Spain. The Ventas de Zafarraya Fault (VZF) west of the Granada basin (36.96° N, 4.14°W) has a beautiful morphologic expression and an exciting history. The fault bounds the Zafarraya polje to the south, with Quaternary sediments to the north (hanging wall) and limestones of the Internal Subbetics in the footwall. Continue reading “The Wednesday Centerfault (5)”
This day’s Centerfault is the Sparta Fault in southern Greece (37.1°N 23.3°E). Being situated on the Peloponessus, the fault marks one of the most prominent geomorphological features of the peninsula. It is famous for the historical 464 BC earthquake that destroyed ancient Sparta. However, the days of Spartian glory ended much later after a severe military defeat in the battle of Leuctra in 371 BC, Sparta never fully recovered. Continue reading “The Wednesday Centerfault (4)”
Following Tomas post let’s stay a little longer on the Corinth Canal. The 6 km long famous Corinth Canal despite being an amazing feat of engineering, since it was constructed 120 year ago, it’s also a geology field trip favourite because it is basically a MEGA TRENCH.
More than 40 faults can be identified some of them offsetting the entire sedimentary column, whereas others are confined within the lower sediments. Therefore, this photo shows a very nice example of an active and inactive fault within the same outcrop. You can rarely see something like that and this is a unique site where everybody can see and comprehend it.
It shows also that faults die. This is very important because there are numerous faults in the crust, however the majority of them are inactive (e.g. can not give an earthquake today, but they did so in the past). So for earthquake geologists their first major goal is to identify which of the faults they map are active (e.g. can generate earthquakes today and represent seismic sources).
Faults also die.
Some days ago a new paper on the paleoseismicity of the Dead Sea area during the late Holocene has been published in JGR. Kagan et al, 2011 investigated two new study sites in the northern and southern parts of the Dead Sea Basin and compared the seismites found there with the information of the Ein Gedi core presented by Migowski et al., 2004.
It’s not easy to prepare weekly Friday links when you are abroad, this is what I had to realize in April. However, I will try to post a natural beauty each Wednesday in the future, the Wednesday Centerfaults and Centerfolds.
Today, I start with the Kaparelli Fault in Greece (38.22°N, 23.23°E). This beautiful limestone fault scarp is more than 2.5 km long and up to 5 m high. The fault was activated during the 1981 Corinth earthquakes. Continue reading “The Wednesday Centerfault (1)”
Some days ago, a great new paper was published on the investigation of soft-sediment deformation in paleoseismology: “Alsop & Marco 2011: Soft-Sediment deformation within seismogenic slumps of the Dead Sea Basin. Journal of Structural Geology 33 (2011) 433-457.” The authors investigated the most beautiful seismites I’ve ever seen and generated different scenarios for their interpretation with respect to paleoseismic events. Continue reading “New paper: Alsop & Marco: Soft-Sediment deformation within seismogenic slumps of the Dead Sea Basin”
Now the EGU2011 in Vienna is over. Thousands of scientists have attended the meeting and more than 13,000 abstratcs were presented. Approx. 20,000 portions of Gulasz and 100,000 Wiener Schnitzels were served, hektoliters of wine and beer went down the throats of thirsty scientists. Some people say the EGU contributes with 10% to the income of Vienna’s bartenders. Several contributions dealt with paleoseismology, paleoseismicity, archeoseismology and paleotsunamis especially on Monday and Friday. Continue reading “Paleoseismicity at the EGU2011”