Symbols from left to right, top to bottom:
Row 1 - Asterisk, Aviform, Circle, Claviform, Cordiform, Crosshatch, Cruciform, Cupule
Row 2 - Dot, Finger Fluting, Flabelliform, Half-Circle, Line, Negative Hand, Open-Angle, Oval
Row 3 - Pectiform, Penniform, Positive Hand, Quadrangle, Reniform, Scalariform, Segmented Cruciform, Serpentiform
Row 4 - Spanish Tectiform, Spiral, Tectiform, Triangle, Unctiform, W Sign (Lake Chauvet type sign), Y Sign, Zigzag
Scientist Genevieve von Petzinger has indisputably proven that the 32 symbols shown in the image are consistently found on cave walls throughout prehistoric Old World Europe. European cave art has been dated to between 30,000 to 40,000 years old. Taken together with work by other scientists who (through analysis of the signature handprints of the cave artists) suggest that many of the cave artists of Old Europe were women lends plausibility to the testimony of the ancient Oera Linda book of Frisia that the alphabet used in this controversial text was developed by an Old European folk mother.
Interestingly, the first graphical symbol significantly noted among the 32 cave art symbols consists of the six-spokes of a wheel (the foundational form used to construct the alphabet used in the Oera Linda). It may be that this first communicating graphical symbol from among these 32 symbols was the mark of a Clan Mother. Further, one can easily understand why the mark of a Clan Mother may have formed the basis for the particular Clan Mother's alphabet used in the ancient Oera Linda. This symbol is also a rune called Hagall, known as the Mother Rune among many runologists. Hagall is my own birth rune.
"Written language, the hallmark of human civilization, didn't just suddenly appear one day. Thousands of years before the first fully developed writing systems, our ancestors scrawled geometric signs across the walls of the caves they sheltered in. Paleoanthropologist and rock art researcher Genevieve von Petzinger has studied and codified these ancient markings in caves across Europe. The uniformity of her findings suggest that graphic communication, and the ability to preserve and transmit messages beyond a single moment in time, may be much older than we think." (Credit - Genevieve von Petzinger)
For more information:
Why Are These 32 Symbols Found in Caves All Over Europe | Genevieve von Petzinger | TED Talks