| 释义 |
Definition of achondrite in English: achondritenoun əˈkɒndrʌɪt A stony meteorite containing no small mineral granules (chondrules). 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 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. |