Understanding why continents break apart is a key question in the field of geology, as it has implications for understanding the Earth's dynamic processes and the evolution of its surface. While the presence of magma is often associated with continental rifting and breakup, there are instances where continents split apart in regions devoid of significant magmatic activity. These regions are known as magma-poor rifts.

To address the intriguing phenomenon of magma-poor rifting and continental breakup, Dr. Jessica Hawthorne, a renowned geoscience expert, has embarked on a comprehensive research project. Dr. Hawthorne's expertise lies in studying the formation and evolution of sedimentary basins and understanding the interplay between surface processes and deep Earth dynamics.

In this new research endeavor, Dr. Hawthorne will focus on investigating magma-poor rifts in several key locations worldwide. By studying these regions in detail, her objectives are to:

1. Identify the mechanisms that drive continental breakup in the absence of significant magma emplacement: Through field observations, geochemical analyses, and geophysical data interpretation, she aims to identify the specific processes that lead to lithospheric thinning and eventual continental separation in magma-poor settings.

2. Constrain the role of pre-existing structures: It is hypothesized that magma-poor rifting can occur in regions with pre-existing weak zones, such as ancient fault systems. Dr. Hawthorne will investigate the relationship between these pre-existing structures and the development of magma-poor rifts.

3. Understand the implications for basin evolution: Sedimentary basins that form in magma-poor rifts often have distinct characteristics, including their stratigraphic sequences and structural features. By studying these basins, she seeks to unravel their unique evolution and the factors that control their formation.

4. Develop new models: The findings from the research will contribute to the development of improved models for continental breakup, incorporating factors beyond magmatic processes. These new models will enhance the understanding of the Earth's dynamic processes and contribute to the broader field of geology.

Dr. Hawthorne's expertise and innovative research approach make her well-positioned to tackle the complexities of magma-poor rifting and continental breakup. Her work will not only advance scientific knowledge but also enhance our understanding of Earth's history and the factors shaping its current landscapes. The outcomes of this research have important implications for comprehending the dynamic nature of our planet and the processes that have shaped its geological features over millions of years.