Where is Howardite found?

Where is Howardite found?

Howardites are achondritic stony meteorites that originate from the surface of the asteroid 4 Vesta, and as such are part of the HED meteorite clan….

— Group —
QUE94200, a Howardite about 5 centimetres (2.0 in) across, found in the Queen Alexandra Range in Antarctica.
Compositional type Stony
Type Achondrite

Where do HED meteorites come from?

HED meteorites are differentiated meteorites, which were created by igneous processes in the crust of their parent asteroid. It is thought that the method of transport from Vesta to Earth is as follows: An impact on Vesta ejected debris, creating small (10 kilometres (6.2 mi) diameter or less) V-type asteroids.

What are Achondrites made of?

An achondrite is a stony meteorite that does not contain chondrules. It consists of material similar to terrestrial basalts or plutonic rocks and has been differentiated and reprocessed to a lesser or greater degree due to melting and recrystallization on or within meteorite parent bodies.

What is Howardite Jasper?

Howardite is an Opalised silicate with a distinctive interwoven and banded pattern and is noted for its rich golden yellow and pinkish-brown colours. At over 50 carats, this high quality gem is a large size for this highly collectable Jasper variety.

Are HED meteorites magnetic?

The HED achondrites form a group of differ- entiated meteorites which are believed to have originated on one parent body [12]. The probable origin of HEDs in a differenti- ated parent body raises the possibility that a magnetic field of dynamo origin in an iron core contributed to any magnetization they possess.

Are achondrites rare?

Achondites are rare. Only a very few % of all meteorites are achondrites. They are so rare because they have to get blasted off a planetary body during an impact event in which they have to reach escape velocity, otherwise they just fall back to the planetary body from which they tried to escape in the first place.

How do chondrules form?

Formation. Chondrules are believed to have formed by a rapid (flash) heating (within minutes or less) and melting of solid dust aggregates of approximately Solar composition under temperatures of about 1000 K. These temperatures are lower than those under which CAIs are thought to have formed.

What material primarily composes the matrix of carbonaceous chondrites?

Like all chondrites, carbonaceous chondrites (with the exception of the CI group) are composed principally of chondrules and refractory inclusions set in a fine-grained matrix.