Tectonic Crossroads: Evolving Orogens of Eurasia-Africa-Arabia

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Field Trips

Midweek Field Trips

Pricing for field trips is a bit tricky. Please read info in table before making selections. Midweek trips are included in your registration fee. Trips on other days are available through either GSA or Asterya for a fee. When signing up via the GSA registration form, price is in US$. When signing up through Asterya, price is in Euro (€).

Midweek Trips
(Wed. only)
Trips During meeting
(not on Wed.)
Pre- and
Post-Meeting Trips
Geological Cultural Cultural Geological
register via GSA register via GSA register via Asterya register via GSA
Ankara Melange
Registrant: Free
Registered Guest: US$50

Beypazari Trona Deposits
Registrant: Free
Registered Guest: US$50

Gerede Section, N. Anatolian Fault Zone
Registrant: Free
Registered Guest: US$50

Kızılcahamam Volcanics: Petrified Forest
Registrant: Free
Registered Guest: US$50

Ankara City Tour
Registrant: Free
Registered Guest: US$45

Hattusas Tour
Registrant: Free
Registered Guest: US$70

Beypazari Tour
Registrant: Free
Registered Guest: US$40

Gordion Tour
Registrant: Free
Registered Guest:US $40
Ankara City Tour
35 €

Hattusas Tour
55 €

Beypazari Tour
30 €

Gordion Tour
30 €

See Field Trips:

Pre-meeting
Post-meeting

pricing in US$ as
noted on descriptions

Midweek FIELD TRIPS — Wednesday, 6 October 2010

1. The So-Called “Ankara Mélange Belt” (Bailey and McCallein 1950, 1953)
Bora F. Rojay, Department of Geological Engineering, METU 06531 Ankara,
The so-called “Ankara mélange belt” is situated on the tremendous Alpine-Himalayan mountain chain along the extensively segmented İzmir-Ankara-Erzican Suture belt (IAES) and is cross-cut by the branches of North Anatolian Fault Zone within central Anatolia (Turkey). The suture belt that lies between the Mesozoic-Paleogene Black Sea Magmatic Arc to the north and Anatolide-Tauride Belt to the south links the Vardar-Vourinos Zone in Balkans (Macedonia-Greece) to the Sevan-Akera Zone in Lesser Caucasus (Armenia).
The “Ankara mélange belt” is differentiated into tectonic subbelts as Paleozoic metamorphics that are unconformably overlain by Triassic clastics: mélange with calcareous blocks (mélange a blocchi calcarei) (Boulder Bed Series) and mélange with ophiolitic blocks (Mélange a blocchi ofiolitici) (Ophiolitic Mélange).
The Cretaceous Ophiolitic mélange (mélange a blocchi ofiolitici) is composed of Cretaceous ultramafic rocks, Cretaceous pillow basalts, Cretaceous radiolarites, and closely associated Upper Cretaceous (Santonian-Maastrichtian) basinal sequences, and Upper Jurassic–Cretaceous limestone blocks, which all lie within a highly sheared-brecciated matrix.
The field trip will introduce the components of the Cretaceous ophiolitic mélange, overlying arc-related basins and overthrusting onto Maastricthian-Paleogene and Lower Miocene lacustrine deposits.
PRICE: Free for registered attendee; US$50 for registered guest.
2. Beypazari Trona Deposits, Ankara Province, Turkey
Cahit Helvaci, Dokuz Eylul University, Geological Engineering Department, 35160 Buca, Izmir, Turkey.
The Beypazarı district is a large area of volcano-sedimentary rocks in the interior of central Anatolia approximately 100 km northwest of Ankara. Trona, lignite and bituminious shale occur in the lower part, and Na-sulfate and gypsum occur in the upper part of the sedimentary sequence in the Beypazarı Miocene basin. The Miocene sequence rests with angular unconformity on basement, which consists of metamorphic, ophiolitic, carbonate, and clastic rocks ranging in age from Paleozoic to Eocene. The sequence has been subdivided into seven sedimentary formations with 11 members and the Teke Volcanics. These sedimentary rock units are, in ascending order: the Çoraklar, Hırka, Akpınar, Çayırhan, Bozbelen and Kirmir formations, and Sarıyar Limestone.
The trona deposit located north of the Zaviye Village is associated with the shale in the lower part of the Hırka Formation and alternates with bituminious shale and claystones. Based on the borehole data, it is estimated that the areal extent of the trona deposit is approximately 8 km2. The trona beds were deposited as two lensoidal bodies within a 70–100-m-thick zone in the lower part of the shale unit. A total of 33 trona beds are known: 16 in the lower trona lens and 17 in the upper lens. The total thickness of the lower trona horizon ranges between 40 and 60 m, and the total thickness of the upper trona horizon is about 40 m. The interval between the lower and the upper trona horizons varies from 30 to 35 m. The total thickness of the trona beds in both lenses varies between 21 and 34 m in the central parts and 2.5 and 12 m in the marginal parts of the ore bodies. The common thickness of the individual trona beds in both trona horizons ranges from 0.4 to 2 m. The isopach contours of both trona horizons are restricted by the Zaviye fault. The central part of the trona deposit is generally thicker than the marginal parts. The trona beds grade laterally into dolomitic mudstones and claystones toward the edges of the basin.
The principal sodium carbonate minerals are trona and minor nahcolite (the latter occurring in the marginal parts of the trona deposits), and trace amounts of pirssonite and thermonatrite occur sporadically. Trona and dolomite are associated throughout the trona zone. Calcite, zeolites, feldspar, and clays are the most common minerals within the associated rocks of the trona deposit. The trona crystals, which are generally white and occasionally grayish due to presence of impurities, formed massively and as disseminated crystals in the claystone and shales. Zeolitization, dolomitization, and chlorizition are rather common within the associated rock units of the trona deposit and probably occurred shortly after deposition or during diagenesis.
The Beypazarı basin was affected by an extensional tectonic regime during the middle-upper Miocene. This extensional regime became a single directional compressional regime during the Late Miocene–Early Pliocene. The sediments with trona, lignite, and bituminous shale deposits were formed within fluvial, lacustrine, and playa-lake (perennial and ephemeral) environments. The Beypazarı Neogene basin is mainly filled by clastics and penecontemporaneous products of adjacent volcanic activity which was centered northeast of the basin. The most likely sources of Na for the formation of the trona and other sodium carbonate salts are the thermal springs, the tuffs interbedded with the sediments, and the extensive Neogene volcanic rocks interfingering with the sedimentary rocks in the northeast part of the basin.
PRICE: Free for registered attendee; US$50 for registered guest.
 
3. Gerede Section of the North Anatolian Fault Zone
Details to come.
PRICE: Free for registered attendee; US$50 for registered guest.

 
columnar basalts
columnar basalts
silis agaclar
4. Kızılcahamam Volcanics: Petrified Forest
Nizamettin Kazancı, Ankara University Faculty of Engineering, Department of Geological Engineering, 06100 Besevler, Ankara, Turkey.
Kızılcahamam-Çamlıdere Geopark which is the first formal attempt to conserve geosites of Turkey in geopark concept is placed at ca 80 km north-northwest of the Ankara city center. It was started to form in 2009 as a non-governmental initiative by earthscientific guidance of Ankara University and by collaboration of many state offices and local municipalities since geopark has not been defined within the Turkish legislation. It covers 26 excellent geosites consisting of volcanic features, hot and mineral waters for anthropogenic activities and geothermal energy, entablature and columnar basalts, lava flows, eruption centers, Petrified Forest, erosional features and scenic landscapes, fish and insect fossils, different color sedimentary and volcanic rocks etc associated with many cultural sites, endemic fauna and flora in a ca 2000 km2. Geographically Kızılcahamam-Çamlıdere area forms transition between semiarid central Anatolian plateau and mountainous northern Anatolia with wet climate. So, this geopark has a unique morphology and habitat together with rich geology. In addition, discovering site of Ankarapithecus meteai the first ape in the world is within this Kızılcahamam-Çamlıdere Geopark even it has not been prepared for visit yet. Details of this geopark project can see in website www.jeoparkankara.com/.
Lithology of the geopark area consisted of mainly pyroclastics and minor lacustrine marl. They are parts of Kızılcahamam volcanic complex of Early to Middle Miocene and also known as Galatian Volcanic Province based on Galats an historical society lived in this region. Volcanic province is bounded from north by North Anatolian Fault Zone. General stratigraphy of the Kızılcahamam area shows that volcanism took place as three different episodes within a time span of 23-11 my. Eruption centers were plenty and at different places in every volcanic period, so it caused to form a very large, spreaded volcanic area. During the long interrupted time of volcanism lakes were formed and marl and clayey limestones were deposited there. Tiny and very fragile insect, bee, fish and leave fossils were also products of that lacustrine facies. Volcanism-lake interactions were also mysterious in this region. Lacustrine pillow lavas, silica bands, chert and obsidians, ash-falls in lakes, various alterations of tuff and pyroclastics are usual formations here apart from silicified woods.
This trip will focus on Petrified Forest nearby Pelitçik and Yahşıhan villages, Güvem columnar basalts and Beşkonak fossils because of time limitation. Pelitçik-Yahşıhan Petrified Forest was exposed in a 2 km long and 300 m wide outcrop. Roots, trunks and branches of pinus, querqus, juniperus, coniferus and oak fossils seem to be alive. According to present literature Neogene petrified forests are only few in the world and found mostly in Mediterranean region. Experts say that Pelitçik-Yahşıhan petrified forest is the richest for both fossil quantity and species point of view. Güvem columnar basalts are unique example of lava flow, rapid and slow cooling, regular and irregular joints as it included columnar and entablature basalts in same section. Particularly various orientations of irregular columns will let you into discussions about formation of the feature. The Beşkonak geosite, ca 4 km away from the Güvem columnar basalt is a rich fossil site. Fish and insect fossils in lacustrine marl are main objects of the geosite. You can see and explain fossil, unfortunately cannot take with you.
Kızılcahamam-Çamlıdere Geopark is an open-air geology museum supported with many cultural and ecological features. Four georoutes (linear itineraries) and three geotours (circular itineraries) designed along highways can give a general idea to visitors. The best way is to spend 3-4 days there for a good scientific survey.
PRICE: Free for registered attendee; US$50 for registered guest.
 

5. Full-day Ankara

7aYou will be picked up from METU Cultural and Convention Center for the city tour. After a short orientation, we will visit the Mausoleum of Mustafa Kemal Atatürk who is the great founder of the Turkish Republic. In this spectacular complex, we are going to walk on the Lionized Road which opens in to the Monumental Courtyard, which is crowned by the Hellenistic temple shaped mausoleum. Also you will have the chance to see the impressive changing of the guard.

7bWe will then head to the Museum of Anatolian Civilizations which is one of the best pre-historic museums in the world. It received the Museum of Europe award in 1999. You will see the splendors collection of Asia Minor through out the millennia, such as the monumental tomb of King Midas with Golden Touch.

7cFinally, we will proceed to the 12th century Aladdin Mosque, which still boasts fine Seljuk woodwork, although it was extensively rebuilt by the Ottomans. Many interesting traditional Turkish houses have been restored in the area, and some have found a new life as art galleries or attractive restaurants serving local dishes. Close to the gate, Hisar Kapisi, we will see the beautifully restored bedesten (covered bazaar). A walk down from the hill near the Citadel Gate will take us to many interesting stalls and vendors selling spices, dried fruits, nuts and all manner of produce. In the late afternoon we will drive you back to METU Cultural and Convention Center and this is the end of our services for the day.

WEDNESDAY PRICE: Free for registered attendees; US$45 for registered guest (register via GSA)
Alternate date: Also offered through Asterya Travel on Monday, 4 October for 35€ (register via Asterya)

Included Not Included
  • Lunch in the local restaurant included water.
  • Restaurant tips.
  • Professional tour director at your service throughout the tour.
  • Sightseeing as described in the itinerary to include entrance fees.
  • Land transportation by private air-conditioned minibus or motor coach depending on group size.
  • Beverages, alcoholic and hot drink in the lunch.
  • Personal expenses.
  • Customary tips to your guide and to your driver.

6. Full-day Hattusas

8Right after breakfast in our hotel, we will take our departure on our way to Hattusas which was the capital of mighty Hitite Kingdom more then 3.000 years ago. After three hours drive when we get there we will visit the remaining of the capital including the grand temple, lions gate, the acropolis etc. Lunch will be served in a local restaurant. And then before we get our departure back, we will also visit the Royal Temple in a mystical atmosphere. Finally we will drive back to your hotel and will be end of our services for today.

WEDNESDAY PRICE: Free for registered attendees; US$70 for registered guest (register via GSA)
Alternate date: Also offered through Asterya Travel on Tuesday, 5 October for 55€ (register via Asterya)

Included Not Included
  • Lunch in the local restaurant included water.
  • Restaurant tips.
  • Professional tour director at your service throughout the tour.
  • Sightseeing as described in the itinerary to include entrance fees.
  • Land transportation by private air-conditioned minibus or motor coach depending on group size.
  • Beverages, alcoholic and hot drink in the lunch.
  • Personal expenses.
  • Customary tips to your guide and to your driver.

7. Half-day Beypazari

6aAfter 1 – 1.5 hours of scenic driving from Ankara, we reach Beypazari. The Beypazari tour stars with Hidirliktepe, a panoramic hill overlooking Beypazari, a good photo opportunity.

The tour will continue with Aladdin Street, a unique place where local Beypazari style houses can be seen.

6bNext in the program will be the Living Museum. The museum is the former home of a wealthy merchant and his wife, who was Beypazari's first female teacher. In addition to the traditional furnishings of the house, the museum features local handcrafts such as needlepoint, embroidery, jewellery, copperware and woodcarving.

Our next stop will be the Aladdin Mosque, dating back to the Seljuk period. (Female visitors attending this tour are kindly asked to bring head scarves while visiting the mosque, due to the Islamic traditions).

After visiting the Aladdin Street area, we then visit the Silversmith's Market to see some examples of locally made silver handicrafts, especially 'Telkari'. Telkari is made by knitting very thin gold and silver wires into necklaces, bracelets and belts. There will be some time available for shopping.

We'll return back to Ankara at 18:00 using the same route.

WEDNESDAY PRICE: Free for registered attendees; $40 for registered guest (register via GSA)
Alternate date: Also offered through Asterya Travel on Thursday, 7 October for 30€ (register via Asterya)

Included Not Included
  • Professional tour director at your service throughout the tour.
  • Sightseeing as described in the itinerary to include entrance fees.
  • Land transportation by private air-conditioned minibus or motor coach depending on group size.
  • Beverages, alcoholic and hot drink.
  • Personal expenses.
  • Customary tips to your guide and to your driver.
8. Half-day Gordion

1aGordion was the home of King Midas, famed in Greek mythology as the possessor of the golden touch. Assyrian records present Midas as the ruler of a powerful Phrygian kingdom in the later 8th century BC. Until recently, it was thought that this King Midas was probably buried in the largest (Tumulus M) of the many tumuli at Gordion, but recent scientific analysis of the tomb has shown that it dates to an earlier period. In the Hellenistic period, Gordion came under the control of Celtic tribesmen, the Galatians, and recent excavations have unearthed evidence of Celtic rites involving animal and human sacrifice.

1bThe University of Pennsylvania Museum has sponsored excavations at Gordion since 1950. Besides actual digging, archaeologists are responsible for the conservation, preservation, and sometimes restoration of architectural remains. They also study, analyze, and conserve a vast range of excavated material, from pottery, glass, and textile fragments to bones (animal and human) and botanical remains. Finally, the results of all this work must be written up and published.

We will visit the city mound, the grand tumulus (previously thought to be of King Midas), and the newly expanded museum.

WEDNESDAY PRICE: Free for registered attendees; US$40 for registered guest (register via GSA)
Alternate date: Also offered through Asterya Travel on Friday, 8 October for 30€ (register via Asterya)

Included Not Included
  • Professional tour director at your service throughout the tour.
  • Sightseeing as described in the itinerary to include entrance fees.
  • Land transportation by private air-conditioned minibus or motor coach depending on group size.
  • Beverages, alcoholic and hot drink
  • Personal expenses.
  • Customary tips to your guide and to your driver.

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