Showing posts with label Croatia. Show all posts
Showing posts with label Croatia. Show all posts

Wednesday, 15 May 2024

Iron Age Illyrian helmet discovered by archaeologists in Croatia.

Archaeologists from the Korčula Town Museum, the University of Zagreb, and Dubrovnik Museums, have uncovered an Iron Age Illyrian helmet at an ancient graveyard on the Peljesac Peninsula in southern Croatia. The helmet was found upright on its own in a separate chamber to any Human burial, leading the archaeologists involved to conclude that it was placed there as a votive offering (an object of value placed in a sacred place as an offering) rather than as grave goods with a specific individual. 

An Illyrian helmet excavated at an Iron Age graveyard on the Peljesac Peninsula in southern Croatia. Marta Kalebota/Korčula Town Museum.

Surprisingly, this is the second such helmet burial found at the cemetery, implying that this was an important ritual activity for the Illyrians of the Peljesac Peninsula. The previous helmet, uncovered in 2020, was dated to about 400 BC, but the style of the newly discovered helmet suggests it to be slightly older, possibly dating to between 500 and 600 BC.

An Illyrian helmet excavated at an Iron Age graveyard on the Peljesac Peninsula in southern Croatia in 2020. Dubrovnik Museums.

The term 'Illyrian' derives from 'Illyrioi' ('Ἰλλυριοί') was used by the Ancient Greeks to describe the peoples of the northwest Balkan Peninsula, and probably refers to a group of peoples with similar cultures and languages rather than a single group  that would have identified as 'Illyrian'. They were regarded as barbarians by both the Greeks and Romans, but appear to have been organised into several distinct kingdoms with well-understood boundaries and trade networks, ruled from walled cities. They were able to hold their territory against potentially aggressive neighbours such as the Greeks, Macedonians, and Thracians, and for a time were considered a maritime power, presenting a threat to shipping on the Adriatic and raiding coastal communities. They proved less able to defend themselves against later Roman incursions, however, and all the Illyrian kingdoms were conquered by Rome in a series of wars between 229 and 168 BC.

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Thursday, 30 December 2021

Isoperla popijaci: A new species of Yellew Sally from Croatia.

Stoneflies, Plecoptera, are an ancient (at least Permian) family of Insects with a global distribution. They are considered useful environmental indicators, as the adults tend to be large and conspicuously coloured, and the larvae live exclusively in well oxygenated fresh water. The genus Isoperla, commonly known as Yellow Sallys, comprises about 188 species found throughout Eurasia and North America, with the Balkan Peninsula being somewhat of a biodiversity hotspot for them; 21 of the 60 species recorded in Europe are found there, with 12 being endemic to the peninsula. Ten of these species have been recorded in Croatia, but it is thought likely that the country is home to more, undiscovered, species, due to its extensive karstic waterways, which make an excellent habitat for Stoneflies.

In a paper published in the journal ZooKeys on 16 December 2021, Dora Hlebec of the Department of Biology at the University of Zagreb, Ignac Sivec of the Slovenian Museum of Natural History, Martina Podnar of the Croatian Natural History Museum, and Josip Skejo and Mladen Kučinić, also of the Department of Biology at the University of Zagreb, describe a new species of Yellow Sally from Croatia.

The new species is described from specimens collected from karstic waters around the Ševerova Cave system. It is named Isoperla popijaci in honour of Aleksandar Popijač, for his work on the Plecoptera of Croatia. These Stoneflies are generally a light brown in colour, lighter on the belly and sides, and with yellowish markings. Adult males measure 17-19 mm in length, while females are 16.5-18 mm long.

 
Morphology of Isoperla popijaci. (A) Head and pronotum in dorsal view (adult male). (B) Habitus (larval). (C) Habitus (adult male). (D) Female terminalia in ventral view. (E) Everted male copulatory organ. Scale bars 0.5 mm. Hlebec et al. (2021).

No truly trogloditic species of Stoneflies are known, but many species, like Isoperla popijaci, are known only from waters close to caves and cave systems, with the same waterways often lacking Stoneflies further downstream. This strongly suggests that when surveying areas such as the Dinaric Alps of Croatia, particular attention must be paid to caves and pits, and underground and temporary rivers and streams associated with them, which are likely to be the homes to highly endemic Stonefly species.

 
Type locality of the Popijač’s Yellow Sally, Isoperla popijaci: Ševerova Cave in Croatia; (A) and (B) photographs in wet phase, (C), (D) photographs in dry phase, (E) map (blue circle indicates type locality). Hlebec et al. (2021).

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Wednesday, 30 December 2020

Magnitude 6.4 Earthquake in central Croatia kills at least seven.

The Centre Sismologique Euro-Méditerranéen recorded a Magnitude 6.4 Earthquake at a depth of 10 km, roughly 3 km to the southwest of the town of Petrinja in central Croatia, slightly before 12.20 pm local time (slightly before 11.20 am GMT) on Tuesday 29 2020. The Earthquake is reported to have caused significant damage, with at least seven fatalities, and was felt across much of Europe. Several aftershocks have been reported following the initial event.

 
The approximate location of the 29 December 2020 Croatian Earthquake. USGS.

Five of the reported casualties occurred in the village of Glina, which is reported to have been completely destroyed by the Earthquake. A twelve-year-old girl has died in the town of Petrinja, where about half of the buildings were either destroyed or are currently thought unsafe to use. A seventh person was found dead in a collapsed church in the village of Žažina. In addition to the known fatalities, twenty six people are being treated in hospitals for a variety of injuries, and many more have been made homeless by the event, with many being temporarily rehomed in emergency accommodation at a nearby military base. Much of the area has also lost its electricity supplies.

 
Rescue workers clearing debris and searching for survivors following a Magnitude 6.4 Earthquake in Croatia on 29 December 2020. Damir Sencar/AFP/Getty Images.

Croatia, and the other states of the western Balkan Peninsula, form the eastern margin of the Adriatic Plate, a piece of the African Plate that has broken away and is now wedged into the southern part of the Eurasian Plate. This is being squeezed by the impact of Africa into Europe from the south, which is pushing western Italy, which sits on the Eurasian Plate, to the east, and Greece and Turkey, which sit on the Aegean and Anatolian Plates, to the west. This squeezing leads to uplift around the margins of the Adriatic Plate, in the Apennines Mountain Range of central Italy and the mountain ranges of the west Balkan Peninsula.

 
Outline map showing the approximate positions of the Eurasian (EU), Adriatic (AD) and African (AF) Plates. Di Bucci & Mazzuli (2003).

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Sunday, 22 March 2020

Magnitude 5.4 Earthquake in northern Croatia.

The Centre Sismologique Euro-Méditerranéen recorded a Magnitude 5.4 Earthquake at a depth of 10 km, roughly 7 km to the northeast of Zhagreb in northern Croatia, slightly before 6.25 am local time (slightly before 5.25 am GMT) on Sunday 22 March 2020. The Earthquake is reported to have caused a number of injuries in Zhagreb, with one fifteen-year-old having died as a result, and damaged a number of buildings across the city. It was felt across most of Croatia and Slovenia, as well as northern Bosnia and Herzogovinia and Serbia, western Hungary and Slovakia, the southern Czech Republic, and eastern Austria and northeastern Italy.

A car crushed by falling debris following an Earthquake near Zhagreb in Croatia on Sunday 22 March 2020. Anadolu Agency/Getty Images.

Croatia, and the other states of the western Balkan Peninsula, forms the eastern margin of the Adriatic Plate, a piece of the African Plate that has broken away and is now wedged into the southern part of the Eurasian Plate. This is being squeezed by the impact of Africa into Europe from the south, which is pushing western Italy, which sits on the Eurasian Plate, to the east, and Greece and Turkey, which sit on the Aegean and Anatolian Plates, to the west. This squeezing leads to uplift around the margins of the Adriatic Plate, in the Apennines Mountain Range of central Italy and the mountain ranges of the west Balkan Peninsula.

  Outline map showing the approximate positions of the Eurasian (EU), Adriatic (AD) and African (AF) Plates. Di Bucci & Mazzuli (2003).

Witness accounts of Earthquakes can help geologists to understand these events, and the structures that cause them. The international non-profit organisation Earthquake Report is interested in hearing from people who may have felt this event; if you felt this quake then you can report it to Earthquake Report here.

See also...

https://sciencythoughts.blogspot.com/2020/03/fragment-of-meteorite-found-in-slovenia.htmlhttps://sciencythoughts.blogspot.com/2018/03/landslide-destroys-houses-in-central.html
https://sciencythoughts.blogspot.com/2018/02/magnitude-44-earthquake-in-dalmatia.htmlhttps://sciencythoughts.blogspot.com/2015/03/magnitude-39-earthquake-in-western.html
https://sciencythoughts.blogspot.com/2015/01/at-least-one-dead-following-landslide.htmlhttps://sciencythoughts.blogspot.com/2014/09/five-dead-in-bosnian-mine-collapse.html
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Tuesday, 13 March 2018

Landslide destroys houses in central Croatia.

Several houses in the town of Hrvatska Kostajnica in central Croatia were destroyed in a landslide on Tuesday 13 March 2018. Nobody was hurt in the incident, which was linked to flooding caused by thawing snow in the region. Landslides are a common problem after severe weather events, as excess pore water pressure can overcome cohesion in soil and sediments, allowing them to flow like liquids. Approximately 90% of all landslides are caused by heavy rainfall.

Damage caused by a landslide in Hrvatska Kostajnica, central Croatia, on 13 March 2018. AP.

Southern Europe has seen a high number of snow related incidents this winter, largely due to high levels of snowfall. This is, in turn caused by warmer conditions over the Atlantic, which leads to higher rates of evaporation over the ocean, and therefore higher rates of precipitation over Europe, which falls as snow in cooler regions such as the Alps. 

See also...

http://sciencythoughts.blogspot.co.uk/2018/02/magnitude-44-earthquake-in-dalmatia.htmlhttp://sciencythoughts.blogspot.co.uk/2015/03/magnitude-39-earthquake-in-western.html
http://sciencythoughts.blogspot.co.uk/2015/01/at-least-one-dead-following-landslide.htmlhttp://sciencythoughts.blogspot.co.uk/2014/09/five-dead-in-bosnian-mine-collapse.html
http://sciencythoughts.blogspot.co.uk/2014/08/magnitude-39-earthquake-in-western.htmlhttp://sciencythoughts.blogspot.co.uk/2013/11/magnitude-49-earthquake-in-southeast.html
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Saturday, 3 February 2018

Magnitude 4.4 Earthquake in the Dalmatia Region of Croatia.

The United States Geological Survey recorded a Magnitude 4.4 Earthquake at a depth of about 24.9 km, about 5 km to the southwest of the town of Donja Brela in the Dalmatia Region of Croatia slightly after 1.50 pm local time (slightly after 12.50 pm GMT) on Saturday 3 February 2018.There are no reports of any damage of or casualties associated with this event, but it was felt in the Dalmatia Region, and in neighbouring Bosnia and Herzegovina.

The approximate location of the 3 February 2018 Dalmatian Earthquake. USGS.

The states of the western Balkan Peninsula form the eastern margin of the Adriatic Plate, a piece of the African Plate that has broken away and is now wedged into the southern part of the Eurasian Plate. This is being squeezed by the impact of Africa into Europe from the south, which is pushing western Italy, which sits on the Eurasian Plate, to the east, and Greece and Turkey, which sit on the Aegean and Anatolian Plates, to the west. This squeezing leads to uplift around the margins of the Adriatic Plate, in the Apennine Mountains of central Italy and the mountain ranges of the west Balkan Peninsula.
 
 Outline map showing the approximate positions of the Eurasian (EU), Adriatic (AD) and African (AF) Plates. Di Bucci & Mazzuli (2003).
 
Witness accounts of Earthquakes can help geologists to understand these events, and the structures that cause them. The international non-profit organisation Earthquake Report is interested in hearing from people who may have felt this event; if you felt this quake then you can report it to Earthquake Report here.
 
See also...
 
http://sciencythoughts.blogspot.co.uk/2016/09/numerous-injuries-after-macedonian.htmlhttp://sciencythoughts.blogspot.co.uk/2015/03/magnitude-39-earthquake-in-western.html
http://sciencythoughts.blogspot.co.uk/2015/01/at-least-one-dead-following-landslide.htmlhttp://sciencythoughts.blogspot.co.uk/2014/12/magnitude-50-earthquake-off-coast-of.html
http://sciencythoughts.blogspot.co.uk/2014/09/five-dead-in-bosnian-mine-collapse.htmlhttp://sciencythoughts.blogspot.co.uk/2014/08/magnitude-39-earthquake-in-western.html
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