English: King Y crater. Cropped from Apollo 16 mapping camera frame 1581. This is an approximate reconstruction of Figure 29-110 of the Apollo 16 Preliminary Science Report (NASA SP-315), which has the following caption:

Enlargement of Apollo 16 metric camera frame 1581.

The text of the report refers to the figure as follows:

Preliminary examination of metric camera photographs from the Apollo 16 mission has revealed a number of interesting volcanic and surficial features in the area between Mare Smythii and King Crater (6° N 121° E). Immediately northwest of King Crater is a depression filled with a relatively smooth-surfaced, low-albedo material that may be composed of debris or, more likely, lava flows. This feature was briefly described by El-Baz (ref. 29-50). The surface of the material displays what appear to be flow levees (area A, fig. 29-110) and wrinkles (area B, fig. 29-110), and the material mantles lineated topography that appears to radiate outward from King Crater (area C, fig. 29-110). The existence of smaller depressions filled with the same material to the southwest and at higher elevations than the large depression, the absence of strand lines within the large depression, and the flow features on the surface of the large depression all suggest that the main source of lava was in the high area to the southwest rather than in the large depression.

A lobate escarpment that trends northeast can be observed along the western margin of the depression (area D, fig. 29-110). This escarpment appears to have formed on a part of the ejecta blanket from the impact that formed King Crater. The escarpment extends into the source area of the flows where the escarpment is mantled by the flows (area E, fig. 29-110). The apparent absence of lava domes, dark halo craters, and other common volcanic features suggests that the flows emanated from one or more fissures.

Note that the pool of "lava" is more recently interpreted as impact melt that was ejected from King crater.