Bev,
well it is not a monument in the classic sense, as there must be at least 3-5 identifiable elements, the eagle for instance would be one element...however in the pics your eagle, [in the last pic looks like a large white dog head, which could be a second elements even though its from the same rock , just a different prespective..and the cross..well it l ooks more like the typical 'St. Georges Cross than the Templar, I think Springer just misspoke, as I am sure he knows the difference. St Georges in my opinion is the precurser to the Knights Templar Cross..
IF you want to be sure, take a compass with you and take the bearing or compass direction that the eagle is facing or pointing, if it says South, then just maybe you might have some little tiny bit of confirmation... Same with the Cross, check if they used Cardinal Points for the arms [N.E.S.W.]
as this cross has been found using the arms and the distance between the arms as Pointers.
And one more thing..be sure to take more pics in June around the Soltice [june 22nd] at high noon..to make sure one of the hidden elements might be a shadow..then maybe just maybe you would have
1.eagle
2.dog head
3.cross
4.shadow
and the 5th element needed to confirm it as a monument might be that cube shaped rock..very inconspicous that a true tracker knows means "xxxxx"
Oh and this is a subtle point as well...that the cross might just be natural cracks..BUT the codemakers used ecactly this kind of thing to confuse people like springer..hehe it is called 'rock incorporation' and is very much used in the laying down of treaure signs and marks...
include in your research any old type of mines and or quarries in this general area..the spanish mined for lots of things besides gold and silver., antimony, cinnnabar, saltpeter,salt, limestone,coal, ect ect.
take the pics with at least 5 megapixels..10 is far better, so that you can zoom in on the pic in your pc, and crawl over every square inch of these rocks...as that eye you mentioned, I saw a circle with an X
inside it..which is a real true sign or mark..meaning end of the trail.. for one use, and keep to the left as you pass this marker..so my favorite 'church goodies' buried somewhere around here..
widen your area of search and look for more signs, if this one is real there will be more..good luck , have fun, and springer was right about one thing, there is nothing under the rocks - if you find nothing else , no shadows or minute marks hidden from the naked eye..then it is just a set of rocks, innocent and perhaps just a farmers marker meaning he moved them out of his way while farming or ect.
oro discriminate
rangler