Geology and its tangential studies, collectively known and referred to in this thesis as geosciences, have been paramount to the transformation and advancement of society, fundamentally changing the way we view, interact and live with the surrounding natural and built environment. It is important to recognize the value and importance of this interdisciplinary scientific field while reconciling its ties to imperial and colonizing extractive systems which have led to harmful and invasive endeavors. This intersection among geosciences, (environmental) justice studies, and decolonization is intended to promote inclusive pedagogical models through just and equitable methodologies and frameworks as to prevent further injustices and promote recognition and healing of old wounds. By utilizing decolonial frameworks and highlighting the voices of peoples from colonized and exploited landscapes, this annotated syllabus tackles the issues previously described while proposing solutions involving place-based education and the recentering of land within geoscience pedagogical models. (abstract)

Although nitrogen is the dominant element in Earth’s atmosphere, it is depleted in the bulk silicate Earth (relative to expected volatile abundances established by carbonaceous chondrites). To resolve this inconsistency, it has been hypothesized that this “missing nitrogen” may actually be stored within the Earth’s deep interior. In this work, we use multi-anvil press experiments to synthesize solid solution mixtures of the mantle transition zone mineral wadsleyite (Mg2SiO4) and silicon nitride (Si3N4). Successful synthesis of a 90% Si3N4, 10% Mg2SiO4 solid solution implies that nitrogen may not be sequestered within the most abundant mineral phases in the Earth’s mantle. Instead, nitrogen-rich accessory phases may hold the key to studying nitrogen storage within the deep interior. Ultimately, quantifying the amount of nitrogen within the mantle will further our understanding of the N cycle, which is vital to maintaining planetary habitability. Similar N cycling processes may be occurring on other rocky bodies; therefore, studying nitrogen storage may be an important part of determining habitability conditions on other worlds, both within in our solar system and beyond.

Beautiful and rich in history, the Arabic language is spoken by over 422 million people. The language has significant social and political importance, and it is increasingly taught in universities around the United States. When languages are taught their aim should be not only to teach learners to communicate effectively, but also to gain a deep understanding and respect of culture, people, and history. The Al-Kitaab textbook series by Georgetown University Press is utilized as the main learning material in most universities in the United States to teach Arabic language. The highly political and negative nature of the series limits students’ comprehension to a political perspective influenced by the conflicts in the Middle East and has a severe impact on not only students’ learning ability but also their perception of the Arabic language and culture. While the series sufficiently provides the political vocabulary necessary for roles in government, it overlooks the importance of a full understanding of the cultural richness and nuances of the Arabic language necessary for an appreciation of history, arts, and literature of the region. The overarching objective of this project is to analyze the Georgetown University Press Al-Kitaab textbook series for Arabic language instruction and compare it to the Vista Higher Learning Sentieri textbook for Italian language instruction to plan a new Arabic curriculum to increase student enrollment. This comparison will explore recurring themes present in each textbook series and display the detrimental and outdated depictions of Arab culture presented throughout the Al-Kitaab series. Different aspects of the textbooks will be discussed including vocabulary and vocabulary progression, biographies of important figures, in-text activities, reading passages, and recurrent themes. Through revamping the learning materials used to teach Arabic, Arizona State University (ASU) and the School of International Letters and Cultures (SILC) can become innovative leaders in the instruction of university-level Arabic language.