79035 (146) Regolith Breccia
Collection:
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Fact sheet

79035 (146) Regolith Breccia
79035 is a dark, porous, fine-grained regolith (soil) breccia containing clasts of ilmenite-rich basalt, fine-grained vesicular breccias and spheres and fragments of glass. Basalt fragments (rotation 1) show moderate deformation, indicated by undulatory extinction in plagioclase and abundant twinning in ilmenite. Rotation 2 shows a feldspar-rich lithic clast and many mineral clasts. The fine-grained matrix consists of very porous glassy and crystalline fragmental material, including angular fragments of both homogeneous and highly vesicular glass and glassy spherules. The matrix glass which cements the crystalline and glassy fragments is commonly homogeneous. It has the highest percentage of agglutinate fragments of the various Apollo regolith breccias. 

The sample weighed 2806 grams before analysis and has not been dated.

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

Apollo 17, the final manned landing mission, had two objectives: to obtain samples of ancient rocks from the lunar highlands and to look for evidence of younger volcanic activity on the valley floor.

This small Collection contains material deriving from both periods, including igneous rocks around 4.3 billion years old from the lunar highlands as well as younger volcanic samples dating from about 3.6 billion years ago.

Apollo 17 was launched on 7 December 1972.

Sample details

Collection: Apollo 17
Type
metamorphic
Rock-forming mineral
olivine
pyroxene
plagioclase
glass
Accessory minerals
ilmenite
metallic iron
troilite
Category guide  
Category Guide
Title
Refers to any word or phrase that appears in the individual rock names. Names are generally descriptive; they allow users to search for broad terms like ‘granite’ as well as more specific names such as ‘breccia’. However, the adjacent descriptions of the specimens captures a wider range of general words and phrases and is a more powerful search tool.
Description
Refers to any word or phrase that appears anywhere in the descriptions of the specimens
Accessory minerals
Minerals that occur in very low abundance in a rock. They are usually not visible with the naked eye and contribute perhapssver, they often dominate the rare elements such as platinum group metals.
Rock-forming minerals
Minerals that make up the bulk of all rock samples and are also the ones used in rock classi?cation.
Timescale
Selecting one or more period, for example 'Jurassic'.
Theme
A term used to group together related samples that are not already gathered into a single Collection. For instance, there is a ‘SW England granites’ theme that includes such rock types as granite, hydrothermal breccia, skarn and vein samples.
Category
A general term used to label a rock sample. It is a useful way of grouping similar samples throughout a collection. Category names are often, but not exclusively, common rock names (e.g. granite, basalt, dolerite, gabbro, greisen, skarn, gneiss, amphibolite, limestone, sandstone).
Owner
The owner of the sample that appears in the collection. For example, NASA owns all the samples that appear in the Moon Rocks collection
We would like to thank the following for the use of this sample: