Вот такой еще вопрос:
Ollantaytambo has been amply discussed in the literature (Gasparini & Margolies, 1980; Agurto Calvo, 1987) and especially Protzen, whose architectural and quarrying studies are most germane here (Protzen, 1985 & 86). About 20 m north of the andesite were brought to the attention of this researcher by Protzen, who described them as being in a "fountain" context. Andesite is unusual here bccause the local geological material is mostly meta-arkosic and arkosic greywacke on the north side of the Urubamba valley, of which much of the Inca complex is constructed (Protzen, 1986, 81), and porphyritic granite on the south side of the valley, which the Kachiqhata quarries supplied for the megalithic monuments at Ollantaytambo (Protzen, 1986, 80). Both of these geologic materials and some of the Kachiqhata quarries have been examined by this researcher. Additionally, the arkosic and granitoid materials have been examined in petrographic thin sections along with the andesite from the Ollantaytambo context. The following petrographic analyses provide details of the petrologic conclusions.
this researcher в данном случае - это "этим исследователем" или "автором статьи"?
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