Ottawa meteorite, Franklin Co., Kansas, USA

Latitude & Longitude (WGS84):	38° 36' North , 95° 13' West
Latitude & Longitude (decimal):	38.60000,-95.21667
Non-native locality type:	Meteorite
Meteorite Class:	LL6 chondrite meteorite
Meteoritical Society Class:	LL6
Metbull:	View entry in Meteoritical Bulletin Database
Köppen climate type:	Cfa : Humid subtropical climate

Ordinary chondrite, brecciated (LL6)
Fall, 9 April 1896; 840 g, single stone

In the late afternoon a series of rapid fire detonations were followed by a whirring sound and a thud. A very surprised farmer attempted to locate the fallen object, but was unable to find anything that day. The next morning his sister found a small meteorite, largely covered with a fusion crust, embedded in the ground about 200 m away from where the farmer had first stood. Detonations had been heard up to 50 km from the impact. The broken portions revealed a light grey chondritic interior with silicate-rich chondrules embedded in a matrix of silicates and opaques. Chondrules of granular olivine (up to 5 mm in diameter) and rarer fine-grained pyroxenes are present. Silicates in both chondrules and matrix — olivine, orthopyroxene, and lesser albitic plagioclase — are accompanied by troilite (~6 wt%) and Fe-Ni metal (~4 wt%). Kamacite and taenite are found both as separate and as contiguous grains. A number of very minor accessory opaques are also reported.

Total iron (21.24 wt%), olivine composition (Fa28), and orthopyroxene composition (Fs25) are characteristic of the LL, very low iron, chondrite group. The LL chondrite group is the smallest of the 3 ordinary chondrite groups and representS ~10 % of all witnessed meteorite falls. Ottawa itself is one of 42 witnessed falls classified exactly as petrologic type 'LL6' at the Meteoritical Bulletin Database (February 2016).

A moderately long cosmic ray exposure age of ~45 Ma has been reported.

Mineral List

9 valid minerals.

Meteorite/Rock Types Recorded

References

External Links