Yes, it is according to Keyes and Rams (2016)
Results: Dental calculus was observed on 1,140 (95%) of the extracted human teeth, and no dental carious lesions were found underlying dental calculus-covered surfaces on 1,139 of these teeth. However, dental calculus arrest of dental caries was found on one (0.54%) of 187 evaluated teeth that presented with unrestored proximal enamel caries. On the distal surface of a maxillary premolar tooth, dental calculus mineralization filled the outer surface cavitation of an incipient dental caries lesion. The dental calculus-covered carious lesion extended only slightly into enamel, and exhibited a brown pigmentation characteristic of inactive or arrested dental caries. In contrast, the tooth's mesial surface, without a superficial layer of dental calculus, had a large carious lesion going through enamel and deep into dentin.
Keyes, P. H., & Rams, T. E. (2016). Dental calculus arrest of dental caries. Journal of oral biology (Northborough, Mass.), 3(1). PMCID: PMC4950958 PDF: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4950958/pdf/nihms761315.pdf