The statement "The Himalaya is still rising" is geologically accurate and reflects the ongoing dynamic processes resulting from the collision of the Indian and Eurasian tectonic plates. This monumental mountain range, the youngest and highest in the world, continues to experience uplift due to the relentless northward movement of the Indian Plate.

Processes Involved:

1. Plate Tectonics and Collision: Approximately 50-55 million years ago, the Indian Plate, moving northward, began to collide with the Eurasian Plate. Unlike typical subduction zones where one oceanic plate dives beneath another, here, continental crust met continental crust. Since both are relatively buoyant, neither could easily subduct completely. Instead, the immense compressional forces caused the crust to buckle, fold, and thrust upwards.

2. Folding and Faulting (Orogeny): The primary mechanism of Himalayan uplift is intense folding and faulting. The continental crust of both plates is compressed and shortened, leading to the formation of massive folds (anticlines and synclines) and numerous thrust faults. Along these thrust faults, older rock layers are pushed over younger ones, effectively stacking the crust and increasing its thickness. The Main Central Thrust (MCT), Main Boundary Thrust (MBT), and Main Frontal Thrust (MFT) are major examples of such fault systems that accommodate the ongoing shortening and uplift.

3. Isostatic Rebound: As the mountains rise, erosion by rivers and glaciers removes material from the peaks. This removal of mass reduces the load on the underlying crust, causing the lithosphere to buoyantly rise further, a process known as isostatic rebound. This acts as a feedback mechanism, where erosion facilitates further uplift, maintaining the high elevations.

4. Seismic Activity: The ongoing collision and crustal shortening are not smooth processes. Stress builds up along the fault lines and is periodically released as earthquakes. These seismic events, particularly along the major thrusts, contribute to the episodic uplift and deformation of the Himalayan range. The frequent earthquakes in the region are direct evidence of its active tectonic nature.

Evidence and Examples:

• Rapid River Incision: Rivers like the Indus, Brahmaputra, and Ganges, originating in the Himalayas, exhibit deep, V-shaped valleys and gorges, indicating that the rate of uplift is often faster than the rate of erosion, forcing the rivers to cut downwards rapidly.
• High Seismicity: The entire Himalayan arc is one of the most seismically active regions globally, with frequent tremors and major earthquakes (e.g., the 2015 Nepal earthquake), demonstrating ongoing tectonic stress and movement.
• Geodetic Measurements: GPS and satellite-based geodetic surveys confirm that the Indian Plate continues to move northward at a rate of several centimeters per year, and the Himalayas are still rising, albeit at varying rates across different sections.
• Presence of Marine Fossils at High Altitudes: The discovery of marine fossils (e.g., ammonites) in sedimentary rocks at very high elevations (e.g., in the Tethys Himalaya) provides compelling evidence that these rocks were once at the bottom of an ancient ocean and have since been uplifted thousands of meters.

In essence, the Himalaya is a living mountain range, a testament to the powerful forces of plate tectonics, continuously shaped by the interplay of uplift, erosion, and seismic activity.