Where Are Chondrules Found?


Most chondrites contain both Type I and Type II chondrules mixed together, including those with both porphyritic and nonporphyritic textures, although there are exceptions to this.

Do Earth rocks have chondrules?

Chondrules are igneous rocks found within chondritic meteorites, which are the most abundant meteorites found on Earth. These rocks provide science with the age of the Solar System and contain a record of the first solids to form and evolve in the earliest time period of Solar System formation.

Are chondrites valuable?

A common stony meteorite, called a chondrite, can sell for $25 or less, but a slice of iron–nickel pallasite laced with olivine crystals can easily fetch a thousand times that. The stories behind them also matter. A meteorite collected after a witness sees its fall brings gobs of money.

How much is a meteorite rock worth?

Common iron meteorite prices are generally in the range of US$0.50 to US$5.00 per gram. Stone meteorites are much scarcer and priced in the US$2.00 to US$20.00 per gram range for the more common material. It is not unusual for the truly scarce material to exceed US$1,000 per gram.

What is the rarest meteorite?

Iron meteorites, the next most common kind, consist mostly of iron and nickel and formed from the core of asteroids or planets. The rarest kind of meteorite are the stony-iron meteorites, containing about equal parts of stone and iron.

What do chondrules look like on a meteorite?

Primitive chondrites

These types of meteorites generally have a dark gray or black fusion crust and a lighter gray interior. … Because these minerals have densities similar to those of most minerals in the Earth’s crust, primitive chondrites will not feel unusually heavy for their size.

How many meteors hit the Earth every year?

It is estimated that probably 500 meteorites reach the surface of the Earth each year, but less than 10 are recovered. This is because most fall into the ocean, land in remote areas of the Earth, land in places that are not easily accessible, or are just not seen to fall (fall during the day).

Where did most of Earth’s water come from?

Multiple geochemical studies have concluded that asteroids are most likely the primary source of Earth’s water. Carbonaceous chondrites–which are a subclass of the oldest meteorites in the Solar System–have isotopic levels most similar to ocean water.

How can you tell if a rock is a meteorite?

Meteorites have several properties that help distinguish them from other rocks:

  1. Density: Meteorites are usually quite heavy for their size, since they contain metallic iron and dense minerals.
  2. Magnetic: Since most meteorites contain metallic iron, a magnet will often stick to them.

What is the most expensive type of meteorite?

The most expensive meteorite, according to the auction catalog, is the Brenham Meteorite Main Mass, and is expected to bring in 750,000 to 1.2 million dollars. The 1,433 pound specimen was found in 2005 in Kiowa County, Kansas.

What do chondrules look like?

Chondrules are usually about one millimetre in diameter and consist largely of the silicate minerals olivine and pyroxene. From textural and chemical relationships, it is clear that they were formed at high temperatures as dispersed molten droplets, which subsequently solidified and aggregated into chondritic masses.


How dense is a meteor?

Most meteorites have densities on the order of 3 to 4 g/cm3, with lower densities only for some volatile-rich carbonaceous meteorites and higher densities for stony irons. For the vast majority of stones, porosity data alone cannot distinguish between different meteorite compositions.

Do all meteorites have a fusion crust?

Most meteorites have at least some fusion crust, however.

Why are chondrules spherical?

The approximately spherical shapes of chondrules has long been attributed to surface tension acting on ~1 mm melt droplets that formed and cooled in the microgravity field of the solar nebula. However, chondrule shapes commonly depart significantly from spherical.

How many meteors hit Earth daily?

An estimated 25 million meteoroids, micrometeoroids and other space debris enter Earth’s atmosphere each day, which results in an estimated 15,000 tonnes of that material entering the atmosphere each year.

How fast do meteors hit the Earth?

How fast are meteorites traveling when they reach the ground? Meteoroids enter the earth’s atmosphere at very high speeds, ranging from 11 km/sec to 72 km/sec (25,000 mph to 160,000 mph).

Has a meteor ever hit the US?

The Sylacauga meteorite fell on November 30, 1954, at 12:46 local time (18:46 UT) in Oak Grove, Alabama, near Sylacauga. It is commonly called the Hodges meteorite because a fragment of it struck Ann Elizabeth Fowler Hodges (1920–1972).

Do meteorites have veins?

Some meteorites do have veins of impact melt. These veins are never linear, however. … Veins in meteorites are usually about the same color as the matrix of the rock because they are composed of melted rock.

What is the difference between chondrites and Achondrites?

Chondrites are pre-planetary rocks, rocks that formed some 4.5 billion years ago directly from the proto-planetary disk of our Solar Nebula. They represent the first solid materials in our solar system. … Achondrites on the other hand are pieces of a differentiated planetary bodies, like the Moon or Mars.

What type of rock is a meteorite?

Stony meteorites are made up of minerals that contain silicates—material made of silicon and oxygen. They also contain some metal—nickel and iron. There are two major types of stony meteorites: chondrites and achondrites. Chondrites themselves are classified into two major groups: ordinary and carbonaceous.

Can you buy a piece of an asteroid?

Stone meteorites are sold as complete stones, as slices and end cuts, and also as broken fragments. Sometimes the buyer may have a choice about the type of specimen for the particular meteorite they will purchase.

Is it legal to own a meteorite?

Yes. It is completely legal to own a meteorite, at least in the United States. … While it is legal to own, buy and sell meteorite pieces first we have to answer who do they belong to when they first fall.

Is a meteorite worth any money?

Meteorites are valuable both to science and the collecting community. … Meteorites have significant financial value to collectors and scientific value to researchers. Meteorite values can range from a few dollars to hundreds of thousands of dollars.