Impact Structures of the World

[ Return ]
Name	SAARIJÄRVI
Status	Proven
Country	Finland
Coordinates	Lat. N 65°17' Long.E 28°25'
Diameter km	2.2
Age Ma or date	600.0 - 1 980.0
Synonyms
Remarks	Diameter of depression is 1.4 - 1.5 km but diameter of geological signs of impact (e.g. shatter cones) can be found in over 2.1 - 2.2 km wide area. About 140 meter deep epression is filled with a sedimentary rocks rare to this region. Although age is given as 600-1980 Ma, it is possible that the age is younger than 600 Ma. Reason for earlier estimates is that crater fill sediments are about 600 Ma old. But it seems possible that these sediments where already there when impact happens and sediments fill the crater later from outside. One reason for this explanation is that there is pdf's ion quartz even in top most portion of crater fill sediments.
	[ Wikipedia ]
	[ Google Maps ]

References
	Pesonen 1997	Pesonen L.J., Lehtinen M., Tuukki P. and Abels A., ''The Lake Saarijärvi structure, Taivalkoski - a new meteorite impact crater in Finland'', Sovelletun geofysiikan XI neuvottelupäivät 22.-23.10.1997 abst., Oulu University (1997)
	Pesonen 1998	Pesonen L.J., Abels A., Lehtinen M. and Tuukki P., ''Lake Saarijärvi: a new impact structure in northern Finland'', Meteoritics & Planetary Science, Vol. 33, No. 4, Supp.t (1998)
	Tietohippu 1998a	"Suomesta voi löytyä lisää meteoriittikraattereita" (in Finnish), an article (no named authors) in Tietohippu-magazine of Geological survey of Finland, nro 1-2 (1998)
	Öhman 2000	Öhman T., Pesonen L.J., Raitala J., Uutela A. and Tuisku P., ''The Saarijärvi crater - older and larger than assumed?'', in abstract for Meteorite impacts in precambrian shields -meeting (May 2000)
	Öhman 2002	Öhman T., A master's thesis (196 pages) with extended abstract in English: ''The indication of cratering process in Saarijärvi impact crater, northern Finland'', University of Oulu, Finland (2002)

SAARIJÄRVI