Прямоугольные раковины в Днепре

[1314,1443,1464,1509,1569,1600,1653,1773,1785,1809,1895,1939,1989,2220,2349,2369,2419,2468,2499,2538,2577,2589,2655,2660,2681,2759,2769,2821,2929,2939,2942,2949,2990,2999,3019,3024,3029,3080,3082,3132,3189,3279,3372,3379,3381,3404,3417,3420,3491,3496,3561,3588,3600,3631,3634,3677,3680,3690,3705,3711,3715,3767,3779,3889,3893,3910,3955,3960,3990,4038,4039,4043,4048,4099,4100,4139,4143,4158,4167,4171,4183,4197,4199,4200,4232,4299,4344,4346,4398,4399,4400,4409,4433,4446,4454,4467,4474,4481,4506,4519,4554,4590,4600,4656,4680,4717,4719,4780,4788,4794,4801,4810,4830,4847,4849,4876,4890,4909,4914,4927,4969,4990,5004,5014,5137,5139,5144,5145,5154,5161,5170,5176,5198,5273,5290,5318,5384,5428,5433,5451,5467,5473,5520,5612,5651,5658,5666,5722,5800,5895,5901,5911,5913,5927,5934,5993,6003,6027,6059,6089,6156,6164,6165,6242,6256,6265,6280,6320,6394,6399,6403,6421,6425,6432,6440,6486,6492,6520,6538,6538,6561,6570,6571,6578,6648,6679,6761,6808,6834,6850,6900,6965,6966,6982,6990,7003,7032,7039,7076,7097,7143,7150,7192,7215,7240,7284,7314,7347,7353,7369,7424,7426,7468,7521,7574,7596,7633,7706,7734,7740,7760,7810,7869,7896,7920,7934,7943,7990,7992,8034,8083,8087,8096,8118,8203,8250,8286,8370,8505,8510,8554,8695,8733,8883,8910,8929,9160,9167,9246,9247,9288,9304,9400,9450,9471,9588,9626,9635,9677,9761,9777,9957,9978,9995,10011,10038,10105,10139,10152,10215,10260,10277,10313,10343,10387,10440,10575,10578,10626,10660,10665,10699,10763,10785,10794,10856,10866,10902,10998,11070,11078,11096,11139,11177,11221,11233,11239,11316,11421,11527,11533,11564,11609,11629,11673,11750,11758,11761,11762,11849,11938,11985,11992,12000,12079,12256,12348,12420,12466,12480,12643,12877,12912,13019,13066,13079,13276,13442,13451,13489,13588,13630,13782,14184,14382,14472,14669,14720,14817,14946,15007,15134,15163,15322,15480,15698,15721,15792,15808,15858,15990,16122,16440,16732,16874,16974,17155,17290,17532,17565,17699,17796,17928,17954,17988,18135,18267,18834,18850,18998,19121,19130,19176,19294,19350,19524,19539,20257,20679,21160,21684,22025,22163,22906,23275,23787,23919,23963,24183,24318,24628,24675,24886,25025,25725,26461,26853,26930,27630,28434,29575,29863,30419,32112,33990,34755,35150,38562,38963,40086,46863,53685,73519,104880]