The geometrical structure of high-energy hadrons in shower cores measured with the KASCADE calorimeter is analyzed.The angular correlation,especially the degree of alignment,is quantified by means of the commonly used parameter gamma_4.The gamma_4 distribution obtained by KASCADE is comparable to that derived by other experiments.The analysis shows that the observed gamma_4 distribution is not linked to angular correlations due to jet production at high energies.The dependence on the transverse momentum p_t in the simulation of hadronic interactions is marginal.In contrast to A4,the maximum distance d_4~(max) between the most-energetic hadrons reveals a sensitivity both on p_t and the primary mass.
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