  Alignment of main fluxes of energy in a target plane is found in families of
cosmic ray particles detected in deep lead X-ray emulsion chambers. The
fraction of aligned events becomes unexpectedly large for superfamilies with
the total energy of gamma-quanta exceeding $10^3$ TeV. This can be considered
as an evidence of existence of coplanar scattering of secondary particles in
interactions of primary particles with superhigh energies ($E_0 \ga 10^{16}$
eV). Data analysis suggests that production of most superfamilies happens low
above the chamber and is characterized by a coplanar scattering and
quasiscaling spectrum of secondary particles in the fragmentation region.
