What are these protuberances on the north edge of runway 10/28 at Mataveri? The single runway (10/28) at Mataveri International Airport (IPC/SCIP) on Rapa Nui1 has (at least according to Google Maps) a few paved protuberances emanating from partway down its northern edge which serve no obvious purpose:



I wondered if at least some of them might be the old turnaround pads from before the runway was lengthened in the early 1980s, but:


if that were the case, one would not expect them to still exist in what at least appears to be good condition a third of a century later, and
they look far too small to be turnaround pads emeritus - compare, for instance, the turnaround pad at the approach end of runway 28:




Does anyone know what these appendages are, and what purpose they serve?



EDIT: As @MikeSowsun points out, the runway would not only have been shorter then, but narrower as well (not having needed to serve widebody jets or distressed spacecraft), meaning that the turnaround pads themselves could be smaller, and that they'd have been at least partly paved over when the runway was widened (leaving only the outboardmost portions visible); this still doesn't address the issue of "how come they're still visible a third of a century after being abandoned", though.



1: Also known by its colonial names of Easter Island and Isla de Pascua.
It isn't a change in the runway length.* It was last lengthened in the 80s to serve as a Space Shuttle emergency landing site (latimes.com), and the length hasn't changed since.
Between c. 2007 and 2011 (sorry clouds got in the way) the runway was resurfaced in stages. In one stage, the runway was shortened and given a temporary (small; cheap) turnaround pad (with centerline markings as well). When this happens, the declared distances are amended.
When the work was done, a new proper one was built, and the temporary small one became vestigial. Note the X marking in the second image, and note that many runways utilize mid-runway turnaround pads to shorten the taxi time back to the terminal (on the west end).
* well, in a sense, it was