The origin of small Solar System bodies (SSSBs) such as asteroids, Trans-Neptunian Objects (TNOs), comets, and meteoroids remains an elusive question in secular and creation cosmogonies. The Hydroplate Theory (HPT) proposes a terrestrial origin, explaining these features as fragments of the crustal debris launched by the fountains of the great deep during the earlier stages of the Flood. However, HPT faces a challenge: SSSBs are predominantly olivine in composition, yet olivine is absent in the granite crust and rare in its predicted basalt subterranean floor. Despite assertions that olivine would be common, the compositions of granite and basalt simply do not lend credence to this idea. Hydrothermal alteration in the subterranean chamber also contradicts HPT predictions, as quartz is a chemically resistant mineral. Rather than dissolving quartz, hydrothermal alteration would replace feldspars, micas, pyroxenes, and olivine with clay, phyllosilicates, and additional quartz. Consequently, the crustal debris launched by the fountains of the great deep should be dominantly granite and quartz, with olivine being extremely rare if present at all. This is precisely the opposite of what we commonly observe in the composition of SSSBs. This represents a significant flaw in the HPT astronomical submodel