A stony meteorite containing no small mineral granules (chondrules).
无球粒陨星
Example sentencesExamples
Sources of other specific meteorites remain unproven, although another set of eight achondrites are suspected to have come from Mars.
A third kind of achondrite would be a rock (like a chondrite) that was simply melted and cooled.
A related group of achondrites, called mesosiderites, are brecciated and metamorphosed.
There are a number of other achondrites that do not fit into any of the preceding groups or subgroups.
This very unusual achondrite has big lumps of iron in it.
Stones are divided into two main subcategories: chondrites and achondrites.
Based on their texture, stone meteorites are divided into two types, the chondrites and the achondrites.
From the crusts of differentiated asteroids and planets come the meteorites we call achondrites.
A single blackened 361 gram achondrite was found in Dar al Gani, Libya at Lat. 26 deg. 55.17’ N and Long. 16 deg. 40.44’ E.
Discovered at Reckling Peak, Antarctica, this type of meteorite is known as an achondrite.
The Specimens below are polished to a high luster on one side to allow viewing of the beautiful crystalline structure characteristic of this rare primitive achondrite!
Primitive achondrites then experienced varying degrees of melting, thermal processing, and recrystallization.
It has been identified in carbonaceous achondrite and iron meteorites.
They are sometimes referred to as enstatite achondrites and might somehow be related to the enstatite chondrites.
The shop offers a wide range of Lunar and Martian meteorites along with many rare achondrites and chondrites.
However, three types of achondrites stand out from the others.
Derivatives
achondritic
adjective
This really bizarre meteorite is a rare polymict breccia containing chondritic and achondritic clasts set in a metal/glass matrix.
Example sentencesExamples
We have a major research program to investigate the thermal histories of lunar rocks, achondritic meteorites, and Martian meteorites.
This means there are a lot of different groups and sub-types of iron meteorite and they can be related to both stony achondritic and chondrite meteorites.
Stony-irons would then be samples from the boundary between the achondritic upper layers and the core.
While still on the parent body, much of the achondritic material was formed by igneous processes similar to those occurring on Earth today.
Origin
Early 20th century: from a-1 'without' + chondrite.