Paul HackingLi, Jennifer2024-04-262024-04-262021-052021-0510.7275/22237971.0https://hdl.handle.net/20.500.14394/18496In 1993, Morrison conjectured that the automorphism group of a Calabi-Yau 3-fold acts on its nef cone with a rational polyhedral fundamental domain. In this thesis, we prove a version of this conjecture for log Calabi-Yau surfaces. In particular, for a generic log Calabi-Yau surface with singular boundary, the monodromy group acts on the nef effective cone with a rational polyhedral fundamental domain. In addition, the automorphism group of the unique surface with a split mixed Hodge structure in each deformation type acts on the nef effective cone with a rational polyhedral fundamental domain. We also prove that, given a log Calabi-Yau surface with a split mixed Hodge structure, if the boundary length is no greater than six, then the cone of curves is finitely generated. Moreover, we explicitly describe these cones. This provides infinite series of new examples of Mori Dream spaces.Algebraic geometrycone conjecturelog Calabi-Yau surfacesrational polyhedralMorrisondeformation spacemirror symmetryAlgebraic Geometrydissertationhttps://orcid.org/0000-0003-4123-886X