The Thesis Proposal Defense of Ms. Abigael L. Castro was held on May 6, 2019 at the NIGS Multipurpose Room. Her topic is on the Calcareous Nannofossil Biostratigraphy of the Lubuagan Formation from Well-Cuttings (Mangosteen-1 Wekk, Santiago City, Isabela) and Exposures in Kalinga (Western Cagayan Valley Basin) with her thesis adviser, Dr. Allan Gil S. Fernando.