15659 (10) Vesicular Basalt
 >View Microscope
Fact sheet
Description: 

15659 was collected together with other fragments (15633 and 15672) in a rake sample. They are grouped together because they are medium-grained vesicular samples of the abundant olivine­ normative Apollo 15 basalt clan. Ilmenite, chromite, ulvospinel, Ba-K feldspar, metallic iron, troilite, fayalite and silica are present as minor minerals (often found in residual patches). Rotation 1 shows a small olivine crystal fully enclosed in pyroxene. Rotation 2 shows a plagioclase-rich region of the sample.

The sample weighed 12.6 grams before analysis and has been dated at 3.34±0.04 billion years (Ar/Ar).

Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/

There is only one thin section of this sample and sadly it has been broken.

In Place
In Time
Accuracy:
Timescale:
Not known
Ma = Millions of years ago
In Focus
Collection:
What\
Type:
Type: 
igneous
What\
Rock-forming minerals:

Rock forming mineral:

What\
Accessory minerals:

Accessory minerals:

What\