Home > Terms > Serbo Croatian (SH) > lmbrij
lmbrij
The geologic history of Earth's Moon has been divided into five broad time periods, or systems. From oldest to youngest, these are pre-Nectarian, Nectarian, Imbrian, Eratosthenian, and Copernican. These systems are defined by the number of impact craters on the ground surface (more craters = older surface) correlated to the absolute ages determined for the lunar rock samples returned to Earth by the U. S. Apollo missions and unpiloted Soviet Luna missions. The Imbrian system extends from 3. 85 billion to 3. 2 billion years ago.
0
0
Improve it
- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Astronomy
- Category: Planetary science
- Company: PSRD
- Product:
- Acronym-Abbreviation:
Other Languages:
Member comments
Terms in the News
Featured Terms
Elizabet Tejlor
A three-time Academy Awards winner, Elizabeth Taylor is an English-American film legend. Beginning as a child star, she is known for her acting talent ...
Contributor
Edited by
Featured blossaries
Marouane937
0
Terms
58
Blossaries
3
Followers
The 10 Richest Retired Sportsmen
Category: Sports 1 10 Terms
Browers Terms By Category
- Conferences(3667)
- Event planning(177)
- Exhibition(1)
Convention(3845) Terms
- Software engineering(1411)
- Productivity software(925)
- Unicode standard(481)
- Workstations(445)
- Computer hardware(191)
- Desktop PC(183)
Computer(4168) Terms
- General jewelry(850)
- Style, cut & fit(291)
- Brands & labels(85)
- General fashion(45)
Fashion(1271) Terms
- SAT vocabulary(5103)
- Colleges & universities(425)
- Teaching(386)
- General education(351)
- Higher education(285)
- Knowledge(126)
Education(6837) Terms
- Project management(431)
- Mergers & acquisitions(316)
- Human resources(287)
- Relocation(217)
- Marketing(207)
- Event planning(177)