Como passar o parâmetro DateTime na consulta SQL para Oracle DB

SELECT * FROM PERSON WHERE PSN_CREATED_DATE >= TO_TIMESTAMP(:createdPrior, 'yyyyMMddHH24missffff')

OracleParameter para = new OracleParameter(":createdPrior", OracleDbType.TimeStamp, ParameterDirection.Input);
para.Value = (Oracle.DataAccess.Types.OracleTimeStamp)value;
command.Parameters.Add(para);