Geokinesis or Terrakinesis is the art of using Psi Energy to manipulate earth. With this ability, one could hurl rock, dirt or minerals at foes with only the power of their minds, create fissures, sinkholes, mudslides or form said rock, mud and soil into constructs, like walls or projectiles. One could even absorb any rock debris or necessary minerals out of desired subjects to use them for oneself.
This is a lot like the other elemental shield techniques. Channel a Psi Energy ball, and imbue it with earth. Feel the ball growing heavy. Then, expand it into a brick hard bubble of earth energy, and expand this bubble until it surrounds you.
Very similar to other energy blades. Create a blade out of Psi Energy, and imbue it with earth. This blade is stable enough to use as a melee weapon.
Channel Psi energy into any shape, and imbue it with earth. To build a new rock, pick up some earth and infuse it with the channeled earth Psi Energy. Make it squeeze it into a rock. Keep squeezing until it hardens into a rock.
Make a Psi Energy ball and imbue it with earth. You may throw this or guide it in any direction you wish.
This ability allows you to harden your skin against Psionic attack and (with practice) physical bruising. Breathe in Psi Energy through your Dan Tien. Then imbue this energy with earth, and imagine it flowing into your skin, hardening it to rock like hardness. When combined with Crystallokinesis, this can be used to give oneself Diamondskin.