A 58-year-old man with a 10-year history of type 2 diabetes mellitus and hypertension presents to the emergency department with acute onset chest pain radiating to the left arm. His blood pressure is 145/92 mmHg, heart rate 102 bpm, and respiratory rate 20/min. An ECG shows ST elevation in leads II, III, and aVF. Coronary angiography reveals a thrombotic occlusion of the right coronary artery with TIMI 0 flow. Histopathology of the thrombus obtained during thrombectomy shows platelets, fibrin, and red blood cells in alternating layers. What is the most likely type of thrombus based on its composition and location?