Geometrically Coherent Linear Discontinuities in Hypogeal Limestone Contexts: Observational Dataset from the Osiris Shaft Lateral Chamber

This work presents an observational morphological dataset documenting geometrically coherent linear discontinuities identified within a lateral chamber associated with the hypogeal system commonly referred to as the Osiris Shaft, Giza Plateau, Egypt.The study is based exclusively on in situ photographic documentation, direct visual inspection, and comparative morphological surface analysis. The objective of the work is to establish a reproducible observational reference framework for the identification and classification of linear morphological discontinuities in complex carbonate hypogeal environments.The documented features include floor recess morphology, vertical linear wall discontinuities, horizontal alteration bands, localized orthogonal junctions, and geometrically bounded surface anomalies. The spatial distribution of these features suggests the presence of non-random morphological clustering within the observed rock volume.At the current stage, no structural, chronological, or anthropogenic attribution is proposed. The dataset is intended strictly as a pre-instrumental observational reference supporting the design of targeted non-invasive investigation strategies.The work contributes to methodological approaches aimed at distinguishing between natural geological variability and potentially structured modification patterns in multi-phase archaeological carbonate contexts.This publication is released as a preprint and is intended to support further scientific discussion and future instrumental verification studies.