Age-dated Nearside Mare Basalt Units by Hiesinger et al. (2000-2011)

Polygons representing the mare basalt units defined in age estimate works by Hiesinger et al. (2000, 2002, 2003, 2010). Each polygon includes the unit name and crater size-frequency distributions model age. See Hiesinger et al. (2011) for details of the methodology and the summary of age dating efforts. For the regions used for crater counting, refer to the Hiesinger2011_Mare_Crater_Count_Areas shapefile.

Unit names consist of letters with numbers (e.g., P60). The letter indicates the mare name and the number indicates the unit ID within each mare. Smaller ID numbers reflect relatively old units and larger numbers indicates relatively younger units.

Letters:

A - Australe
H - Humorum
Hu - Humboldtianum
I - Imbrium
S - Serenitatis
T - Tranquillitatis
P - Oceanus Procellarum
N - Mare Nubium
C - Mare Cognitum
IN - Mare Insularum
F - Mare Frigoris
V - Mare Vaporum
Ma - Mare Marginis
Sy - Mare Smythii
SM - Sinus Medii
LT - Lacus Temporis
LA - Lacus Aestatis
PP - Palus Putredinis
CGr - Grimaldi
CCr - Crüger
CRo - Rocca A
CSc - Schickard
CHu - Hubble
CJo - Joliot
CGo - Goddard

When citing this product, use the following reference: Hiesinger, H., Head III, J. W., Wolf, U., Jaumann, R., Neukum, G. (2011) Ages and stratigraphy of lunar mare basalts: A synthesis, Geological Society of America Special Papers 477, 1-51. https://doi.org/10.1130/2011.2477(01)

Polygon shapefiles are available in the IAU Moon 2000 Geographic Coordinate System in both the -180 to 180 and 0 to 360 longitude domains.

Longitude Domain:	Product Name:
       180		HIESINGER2011_MARE_AGE_UNITS_180
       360		HIESINGER2011_MARE_AGE_UNITS_360

Shapefile Field Descriptions:
UNIT: Mare Unit Name
MODEL_AGE: Unit Model Age (Ga)

References:

Hiesinger, H., Jaumann, R., Neukum, G., Head III, J.W., (2000) Ages of mare basalts on the lunar nearside. J. Geophys. Res. Planets 105, 29239. doi:10.1029/2000JE001244.

Hiesinger, H., Head III, J.W., Wolf, U., Neukum, G., (2001) Lunar mare basalts: Mineralogical variations with time. Lunar Planet. Sci. 1826.

Hiesinger, H., Head, J.W., III, Wolf, U., Jaumann, R., and Neukum, G. (2002) Lunar mare basalt flow thicknesses determined from crater size-frequency distributions: Geophysical Research Letters, v. 29, doi:10.1029/2002GL014847.

Hiesinger, H., Wolf, U., Jaumann, R., Neukum, G., (2003) Ages and stratigraphy of mare basalts in Oceanus Procellarum, Mare Nubium, Mare Cognitum, and Mare Insularum. J. Geophys. Res. 108. doi:10.1029/2002JE001985.

Hiesinger, H., Head III, J.W., Wolf, U., Jaumann, R., Neukum, G. (2010) Ages and stratigraphy of lunar mare basalts in Mare Frigoris and other nearside maria based on crater size-frequency distribution measurements. J. Geophys. Res. 115. doi:10.1029/2009JE003380.

Hiesinger, H., Head III, J. W., Wolf, U., Jaumann, R., Neukum, G. (2011) Ages and stratigraphy of lunar mare basalts: A synthesis, Geological Society of America Special Papers 477, 1-51.doi:10.1130/2011.2477(01)