A Paper was submitted at theInternational Conference on Geoarchaeology and Archaeomineralogy titled
"GEOLOGICAL ASPECT OF THE PROBLEM OF DATING THE GREAT EGYPTIAN SPHINX CONSTRUCTION"

which states in its Abstract that The Great Egyptian Sphinx dates back to the Pleistocene Era.

Theosophists further hold that human civilization, like all other parts of the universe, develops through cycles of seven stages. Blavatsky argued that humanity, and indeed every reincarnating human soul, evolves through a series of seven "Root Races". Thus in the first age, humans were pure spirit; in the second age, they were sexless beings inhabiting the now lost continent of Hyperborea; in the third age the giant Lemurians were informed by spiritual impulses endowing them with human consciousness and sexual reproduction. Modern humans finally developed on the continent of Atlantis. Since Atlantis was the nadir of the cycle, the present fifth age is a time of reawakening humanity's psychic gifts. The term psychic here really means the realization of the permeability of consciousness as it had not been known earlier in evolution, although sensed by some more sensitive individuals of our species.

The authors of the report have another point of
view in considering the problem. We have taken the GES age
such as it was indicated by theosophist Yelena Blavatskaya in
one of her basic works (1937). She wrote: “Notice the
indestructible witness of evolution of Human races, from
Divine, and especially Androgynous race, the Egyptian Sphinx,
that mystery of centuries”. According to Blavatskaya the time of
GES erection should exceed 750000 years. Are there some
geological indications which are evidence for such an old age
of the Sphinx? Consider the brief prehistory of the problem.

They have mixed up a legitimate comparison of stratigraphic layers in different places that can be used to date the formation of the rock itself, with a ridiculous suggestion that the Sphinx must have been underwater to generate the erosion profile that we see today.

If the rock has a varying density and consistency, a similar erosion profile will emerge whether it due to water movement or wind blown sand, and regardless of the time period during which the erosion took place.

Just another in a long line of nonsense presentations and papers and articles with a pseudo scientific veneer, but major flaws in logic and argument lurking just under the surface.

Blavatskaya, Ye. L. 1937. Tainaya Doktriona. Vol. 2. Uguns,
Riga, 1008 p. (in Russian)

The authors of the report have another point of
view in considering the problem. We have taken the GES age
such as it was indicated by theosophist Yelena Blavatskaya in
one of her basic works (1937). She wrote: “Notice the
indestructible witness of evolution of Human races, from
Divine, and especially Androgynous race, the Egyptian Sphinx,
that mystery of centuries”. According to Blavatskaya the time of
GES erection should exceed 750000 years. Are there some
geological indications which are evidence for such an old age
of the Sphinx? Consider the brief prehistory of the problem.

Researcher submits abstract to conference, conference accepts abstract along with a bunch of others on basis of short abstract, presenter presents full paper to people with superficial knowledge of subject, presenter expects to have paper published along with other presenters, peer reviewers have no real knowledge of subject.

The average conference/paper set up or even peer reviewed journal is not intended to be court-case standard review process.

The ultimate overseeing mechanism is the wider peer review process, i.e. experts read paper and spot errors.

But the two major events both coincided with enormous so-called Heinrich events approximately 16,000 and 47,000 years ago, when huge numbers of icebergs broke off of the Laurentide Ice Sheet, which covered most of Canada and much of the northern United States, into the north Atlantic.

Hendy proposes that the Heinrich events triggered sea-level rise, which caused the margins of the Cordilleran Ice Sheet to float up and destabilize.