Linné crater is a young, well preserved impact crater on the western edge of Mare Serenitatis, at coordinates: latitude = 27.7, longitude = 11.8. It is 2.2 km in diameter and bowl-shaped and is often cited as a good example of a fresh impact crater. Its actual age is unknown but thought to be less than 10 million years.
It has been used to investigate how cratering occurs in mare basalts and the report from the 42nd Lunar and Planetary Science Conference (2011) has a very good description of the crater and compares it to the terrestrial Barringer Crater (aka Meteor Crater). The report can be found here: Linne: Simple Lunar Mare Crater Geometry from LRO Observations
There is some controversy about Linné crater to do with ‘transient lunar phenomena’ (TLP) maybe caused by outgassing. In the nineteenth century some astronomers believed that they had seen changes around the crater, in some cases they said that the crater had vanished leaving only a mound behind. This is discussed here: The Linné Crater Controversy
[NASA/GSFC/Arizona State University]
Colour coded shaded relief map of Linné crater created from an LROC NAC stereo topographic model. The colours represent elevations; cool colours are lowest and hot colours highest.
The following site contains a movie of a “fly around” Linné crater: