1Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007 1970’sYear 1998 Geological heritage in...
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Transcript of 1Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007 1970’sYear 1998 Geological heritage in...
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1Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
1970’s Year 1998
Geological heritage in Finland as an example of sustainable use of
geosites
Keijo Nenonen and Olli BreilinGeological Survey of Finland
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2Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Carta Marina 1539
Bishop Olaus Magnus
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3Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Zacharius Topelius 1873
"Most noticeable are the effects of this, partly still unexplained, phenomenon. The land rises from the sea, the sea flees, shores are exposed, and the slope is moving forward. Where in days of old ships were sailing, now hardly a ship can travel; where once the fisherman cast his net, now his cows go grazing on the coastal meadow. Banks and rocks appear out of the water, of which no sea chart has had knowledge before; banks expand into islets, these grow together and connect with the mainland. Beaches expand; harbours dry up, seaports must move after the fleeing sea. Every generation of men, new arable land rises from the sea, every century grants Finland a kingdom“.
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4Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Kvarken Archipelago / High coast
Sweden
Finland
/High Coast
/Kvarken Archipelago
Kvarken Archipelago (Finland), nominated 2006, is a extension for the High Coast
(Sweden) World Heritage property that was nominated year 2000 and is thus
transboundary serial property of both Finland and Sweden with name
Kvarken Archipelago / High Coast.
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5Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Criteria (i)
(2002 i 2005 viii) to be outstanding examples representing major stages of earth's history, including the record of life, significant on-going geological processes in the development of landforms, or significant geomorphic or physiographic features;
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6Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Highest shore line at Sweden after deglaciation (285 m mpy)
Justification for Inscription for High Coast:The site is one of the places in the world that is experiencing isostatic uplift as a result of deglaciation. Isostatic rebound is well-illustrated and the distinctiveness of the site is the extent of the total isostatic uplift which, at 294m, exceeds others. The site is the “type area” for research on isostacy, the phenomenon having been first recognised and studied there.
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7Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Justification for Inscription for Kvarken Archipelago:The Kvarken Archipelago, with its 5600 islands and surrounding sea, is of exceptional geological value for two main reasons.
1) It is an area of rapid glacio isostatic uplift with rates that are among the highest in the world. The uplift has been ongoing for thousands of years and is associated with major changes in the water bodies in post glacial times. The Kvarken, along with the existing High Coast, its Swedish equivalent on the west coast of the Gulf of Bothnia, are key areas for the understanding of the processes of crustal response to the melting of the continental ice sheet.
2) The Kvarken area possesses a distinctive array of glacial depositional landforms, such as De Greer moraines, which add to the variety of glacial landscapes features in the region and reinforce the previous validity of the High Coast inscription. IUCN considers that thenominated property meets this criterion
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8Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Kvarken Archipelago with numbers
•Area 194 400 ha, 85 % sea area•Coast line 2416 km•Number of islands and islets 5600•Inhabitants 2500•Water depth 10 – 15 m, deepest course 25 metres near Holmö Island (Sweden)•Brackish water, salt content 4-5 ‰•Ice covered 140-150 days per year•Water flow 17 000 m3 per second (from NE to SW)•The total size of the KA/HC transboundary serial property is 336,900 hectares.
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9Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Ahtisaari avasi portin Merenkurkun maailman luonnonperintöalueelle
Merenkurkun maailman
luonnonperintöalue vihittiin 8.9.2007
lauantaina Björkön Svedjehamnissa.
Kultareunuksen tilaisuuteen loi
presidentti Martti Ahtisaari.
Ympäristöministeri Paula Lehtomäki
lupasi, että ainokaisesta
pidetään hyvä huoli: lisäbudjetissa
tulee rahaa 1,7 miljoonaa euroa.
Pohjalainen 9.9.2007
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10Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Ministeri lupasi pitää ainokaisestaan huolta
Ympäristöministeri Paula Lehtomäki lupasi, että Suomen ainokaisestapidetään hyvää huolta. Tuskin Suomeen kovin pian saadaan toista maailman luonnonperintöaluetta Merenkurkun saariston lisäksi.
Pohjalainen 9.9.2007
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11Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Future trans boundary WH initiative: Saimaa- Pielinen-Ladoga lake area owing outstanding universal nature values, both biological and geological??
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12Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Baltic Ice Lake (late)
Litorina SeaAncylus Lake
Yoldia SeaBaltic Ice Lake (early)
M. Saarnisto (2003), drawings O. Sallasmaa
Deglaciation - The history of the Baltic Sea
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13Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Glacial isostatic land uplift
Isobase mm/year
Processing Markku Poutanen
Finnish Geodetic Institute
High coast
Kvarken Archipelago
Botnian Bay
Baltic Sea
Gul
f of
Bot
hnia
Year 4000
High Caost
Kvarken Archipelago
”The main ongoing geological process – changes the shoreline and scenery in a span of human life time.”
Botnian Sea
Picture Hanna Virkki (GTK)
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14Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Land is arising from the sea, Gåsgrund 1978 ja 2006© Metsähallitus, Photo Seppo Lammi 2006
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15Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Geodiversity on glaciated terrain
Geologic formations and features created by continental ice sheet
Drumlins
Flutings
Ribbed - moraines
De Geer - moraines
Hummocky moraine
Boulder field
Deep water sediments, clay/silt
Continental ice sheet Drawings Harri Kutvonen (GTK)
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16Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Geology of central area of the Kvarken ArchiplagoBased on 1:20 000 mapping of Quaternary deposits and formations
Deep water sediments, silt and clay
Glaciofluvial formations, sand and gravel (esker)
Littoral deposits, sand and gravel
Bedrock outcrops
Glacial formations, Ribbed-moraines
Glacial till
Glacial formations, De Geer-moraines
10 km
N
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17Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
A) Ice push and squeeze of diamicton
B) Deepwater sedimentation C) Land uplift and isolation of water bodies
Schematic drawings of formation of the De Geer – moraines in the Kvarken Archipelago
Keijo Nenonen, drawings Harri Kutvonen (GTK)
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18Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Svedjehamn De Geer moraine field - Interpretation of the De Geer moraines at shallow sea area (digital airphotos)
Interpretation Riikka Koskinen (GTK)
Svedjehamn
Aerial photo © Maanmittauslaitos
ICE FLOW DIRECTION
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19Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
De Geer moraines on the sea floor, Replot
Interpretation Anu Reijonen 2004A) Echo sounding
B) Aquistic reflektion sounding
Glacial landforms
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20Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
De Geer moraine – field, Svedjehamn, Björkö© Metsähallitus, Photo Seppo Lammi 2006
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21Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
De Geer moraine – field , Svedjehamn, Björkö© Metsähallitus, Photo Seppo Lammi 2006
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22Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
De Geer moraine – field, Svedjehamn, Björkö© Metsähallitus, Photo Seppo Lammi 2006
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23Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
De Geer – moraine, Svedjehamn
Photo © Jukka-Pekka Palmu, GTK 2002
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24Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Narrow and stony water way, Svedjehamn, BjörköPhoto © Olli Breilin, GTK 2006
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25Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Flada-klu – lagoon-lake series , Lappören© Metsähallitus, Photo Seppo Lammi 2006
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26Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Ribbed - moraines, Björkögrunden-islands
• Rogen like moraines at Björkögrunden.
© Maanmittauslaitos 13/MYY/06
ICE FLOW DIRECTION
Picture Jukka Ojalainen
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27Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Picture © Metsähallitus
Ribbed – moraines, Valassaaret-islands
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28Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Land uplift phenomena has many exiciting attracts for tourists. Uplifted rockbridge at Valsörarna from 19th century.
Photo Olli Breilin (GTK)
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29Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
IUCN inspection in primitive forest of Mickelsörarna - islands
Photo Olli Breilin (GTK)
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30Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Photo Jukka Ojalainen, GTK
Boulder field, Bergö Gaddarna - islands
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31Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Geological mapping on recently uplifted outcrop of peneplated crystalline bedrock surface
Photo Olli Breilin (GTK)
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32Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Age Relation of the Striations
Undefined age relation
The Youngest Local Direction
Older Local Direction
The Oldest Local Direction
Picture Jukka Ojalainen
Complex flow pattern of the continental ice sheet
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33Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Complex flow pattern of the continental ice sheetHundreds observations of striations
– Normally 2, often 3 and even 5 different directions
N
310º
355º
45º
Picture and interpretation Jukka Ojalainen, GTK
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34Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Raised beaches and on
going littoral processes.
Littoral deposits
Norrskär
Märäskäret
Photos Olli Breilin (upper) ja
Jukka Ojalainen (lower),
Drawings Harri Kutvonen
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35Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Field-labyrinth.
A shelter for seal
hunters and fishermans
Old remains of human activity on ancient shingle fields
Photos Jukka Ojalainen
Editing Harri Kutvonen
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36Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Nordic cooperation – Geonat-project geoexcursion at Umeå area
Photo Olli Breilin (GTK)
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37Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
Korsholms kommunMustasaaren kunta
Vaasan kaupunkiVasa stad
K. H. Renlundsstiftelse
Nomination and research partners
INTERREG IIIA Kvarken-MittSkandia – program
YmpäristöministeriöLänsi-Suomen ympäristökeskus
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38Keijo Nenonen and Olli Breilin, MAEGS-15, 16.9.2007
“Sampling” at Norra Djupörbådan
© Photo Hannu Kujala;GTK 2004
Thank you for your attention