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Martian Meteorites | Lunar Rocks | HED Group | PAC Group | Carbonaceous Chondrites | Rare Chondrites Last Updated: 7 May 2018

Shergottites

The shergottites are named for their type specimen, an achondrite that fell in Shergotty, India, in 1865. Comprising 17 distinct members, they represent the most abundant type of Martian meteorite. Shergottites are igneous rocks of volcanic or plutonic origin, and they resemble terrestrial rocks more closely than do any other achondrite group. They all show exceptionally young crystallization ages of about 150 to 200 million years, and they usually exhibit signs of severe shock-metamorphism. Typically, the plagioclase in shergottites has been converted to maskelynite, a glass that is produced when plagioclase is subjected to shock pressures of at least 30 GPa. It is likely that the maskelynite was formed by the impact forces that blasted the shergottites from the Martian surface and into space. Calculations show that it requires a major impact event to accelerate any material to a speed high enough to escape the planet's gravity - one of the reasons why the SNC meteorites are such a rare class. Based upon their mineral compositions, the shergottites are further subdivided into two distinct subgroups: the basaltic subgroup, and the lherzolitic subgroup.

 

NWA 856 basaltic shergottite

Found 2001 in Morocco

TKW 320gr

see complete abstract (1Mo)

see NASA page about NWA 856

NWA856 -00

crusted full slice, many long augite crystals, the only NWA 856 full slice available.

15.34gr

SOLD

NWA856 -000

Very nice crusted endcut !

25.74gr

price on request

NWA856 -12

Very nice crusted slice !

4.168 gr

SOLD

NWA856 -13

Very nice crusted slice !

1.330 gr

Price on request

NWA856 -14

Nice and thin crusted slice !

1.354 gr

SOLD

NWA856 -15

Very nice crusted slice !

1.30 gr

SOLD

NWA856 -16

Thin and nice crusted slice !

0.826 gr

SOLD

NWA856 -07

slice fragment with crust

0.075gr

SOLD

NWA 856 -08

Nice fragment !

0.230gr

SOLD

NWA 856 -09

Nice small endcut with crust !

0.382gr

SOLD

NWA 856 -10

small fragments for science !

0.544gr

SOLD

 

 

Chondrites for Sale :
>Carbonaceous Chondrites
   > CM Group (Mighei Type)
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   > CK Group (Karoonda Type)
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   > CH Group (High-Metal Type)
   > CB Group (Bencubbinites)
   > CI1 Group (Ivuna Type)
>Ordinary chondrite
 
>H Group
   >L Group
   >LL Group

> Rare Chondrites
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Achondrites for Sale :
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   > Chassignite
   > Shergottites
   > Nakhlites
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> Lunar Meteorites - LUN
   > Lunar Mare Basalts
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   > Howardites
   > Eucrites
   > Diogenites
> Primitive Achondrites 
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   > Ureilites
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> Other rares Achondrites
   > Angrites
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Iron and Stony-Iron For Sale
   > Iron
   > Pallasites
   > Mesosiderites & Silicated
tektites and impact glass:
> Spinning Tektites
> Lybian Glass
> Moldavite/carved moldavite
> Moldavite pendant

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