Granite Intrusion

The Granite Intrusion refers to the persistent object and associated phenomenon of a non-native granite slab that manifests periodically within designated Neutral Zones of the Tower. It is a class -7 Physical Manifestation, catalogued under both Geotemporal Events and Anomalous Materials. Its study and administration are the primary remit of the Clerks of the Granite Step, though its nature is contested by the Clerks of the Unblinking Eye.

Physical Description

The Intrusion typically manifests as a rectangular slab of polished grey granite, measuring 2.13 by 1.07 meters, with a consistent thickness of 0.3 meters (a unit of measurement formalized as one Thirty-Second Step). Its edges are seamlessly integrated into the host floor's material, leaving no discernible seam or grout line. The surface is flawlessly smooth, incapable of retaining dust or moisture, and bears no tooling marks. A persistent thermal anomaly is present: the air directly above the slab maintains a temperature differential of -2.5°C relative to the ambient environment, as documented in the entry for Floor 771. A low-frequency hum, measured at 47 Hz, is detectable within a 5-meter radius for the duration of the manifestation.

Manifestation Cycle

The Intrusion appears without warning in pre-designated neutral zones for a period of 4 to 7 days, after which it demanifests with equal suddenness, leaving the original flooring intact. The Clerks of the Granite Step maintain the primary predictive model for its recurrence, which historically cycles every 127 to 131 days. Deviations from this predicted cycle are meticulously recorded in the Nodal Register (Registry Designation NR-α7), the principal repository for data from Nodal Units deployed at known manifestation sites. These deviations are analyzed for patterns of Haplotype Recurrence, though no conclusive predictive algorithm has been ratified under Concordant Law.

Administrative Context

Governance of the phenomenon falls under the Third Concordance, Annex Δ, "On Ephemeral Architectonics." The Clerks of the Granite Step are authorized to declare a zone of controlled access for the duration of a manifestation, a power derived from Clause 14.7. Their authority, however, is not unchallenged. The Clerks of the Unblinking Eye formally dispute the foundational assumption that the Intrusion is a singular object with a predictable cycle, positing instead that each manifestation is a unique event whose resemblance is coincidental. This dispute is currently docketed under Intent Docket ID-8814 and remains unresolved, preventing any amendment to the core Concordances.

Associated Documentation

Beyond the Nodal Register, the Intrusion is referenced in several cross-indexed holdings. The Granite Library on West Spiral Stairwell, Floor 302 curates all scholarly treatises on its composition. Observations related to the atmospheric effects of its manifestation, particularly the stable Pressure Differential noted at its perimeter, are filed with the Department of Ambient Metrics. All legal instruments pertaining to its management cite the precedent set by the Granite Intrusion event of Cycle 44, which established the protocol for neutral zone designation.

Interpretive Disputes

The central ontological question—whether the Intrusion is an object that periodically visits, or an event that generates a temporary object—defines the schism between the two principal clerical bodies. The Clerks of the Granite Step's entire operational model relies on the former interpretation, treating deviations as data points for a refined cycle. The Clerks of the Unblinking Eye argue the latter, rendering predictive models moot and classifying the Nodal Register as a catalog of unrelated occurrences. This debate is considered academic by most Librarians, but it directly impacts resource allocation for monitoring stations and the legal status of materials recovered from the slab's immediate vicinity during manifestation.